







A system of equations. 
20200427 

solomon pose la question : xy + x =28
x + y +4 Penny Nom lui répond. 





Two equations 
20160917 

Nilesh pose la question : How to solve (xy)^1/2 + 3(xy) = 30 ; xy + 3(xy) = 11? Penny Nom lui répond. 





A system of linear equations 
20160124 

kareem pose la question : my name is kareem
and i am a student i have a math puzzle and i tried to solved it but it always have same mistake
xy=9
x+z=12
zn=14
y+n=2 Penny Nom lui répond. 





Two transport companies 
20160106 

Brynleigh pose la question : The Sugar Sweet Company will choose from two companies to transport its sugar
to market. The first company charges $5096 to rent trucks plus an additional fee of
$200.75 for each ton of sugar. The second company charges $5500
to rent trucks plus an additional fee of $175.50 for each ton of sugar.
For what amount of sugar do the two companies charge the same?
What is the cost when the two companies charge the same? Penny Nom lui répond. 





1999 equations in 1999 unknowns 
20141128 

Subrahmanya pose la question : Solve the following system of 1999 equations in 1999 unknowns :
x1+x2+x3=0, x2+x3+x4=0……., x1997+x1998+x1999=0,
x1998+x1999+x1=0, x1999+x1+x2=0.
(in x1,x2,...................,x1999 the numbers 1,2,.............,1999 are subscripts) Penny Nom lui répond. 





A system of equations 
20130813 

Nina pose la question : 3x2y=8
x+3y=5
What is the solution of the system of equations Penny Nom lui répond. 





Two quadratic equations 
20121122 

fahmie pose la question : graph and solve the intersection of the following equations:
x^2+y^2=4
x^2+2y=4 Penny Nom lui répond. 





What is the speed of each car? 
20101104 

Jennifer pose la question : two cars are 420 miles apart and traveling towards each other along the same road. They meet in 3.5 hours. One car is traveling 15mph slower than the other. What is the speed of each car?
This must be solved using a system of equation, I have no idea? Stephen La Rocque lui répond. 





A system of equations 
20100330 

samantha pose la question : the equations of two lines are 6xy=4 and y=4x +2.what is the value of x in the solution for this system of equations? Penny Nom lui répond. 





The sides of a 306090 triangle 
20100329 

maris pose la question : Find the sides of a 306090 triangle whose perimeter is 6. The solution must use systems of equations using 3 variables. Penny Nom lui répond. 





How many CDs and videos did the store sell? 
20100301 

dawn pose la question : A used book store started selling CDs and videos. In the first week,the store sold 40 used CDs and videos,at 4.00
per CD and 6.00 per video.The sales for both CDs and videos totaled 180.00 she wrote a system of equations to represent the situation.Then she graph the system of equations
thanks Dawn Tyler Wood lui répond. 





A right triangle 
20091012 

Josseph pose la question : A right triangle has an area of 84ft sq. and a hypotenuse 25ft long. What are the lengths of the other two sides? Penny Nom lui répond. 





Simultaneous equations 
20090828 

onias pose la question : solve 3/a  2/b = 1/2 , 5/a + 3/b = 29/12 Robert Dawson lui répond. 





A rectangular park 
20090206 

Debbie pose la question : A park named Writer's Rectangle opened in town. When asked about the dimensions of the rectangle, the city planner, responded with these clues: The diagonals of the rectangular park plus its longer sides together measure seven times one of the shorter sides. The length of one diagonal is 250 m longer than one of the shorter sides. Use this information to find the area of the park. Stephen La Rocque lui répond. 





The substitution method 
20090206 

amber pose la question : Pleasse help me with this problem
x+y=2
y2x=1 Penny Nom lui répond. 





solving four simultaneous equations 
20080718 

Muhammad pose la question : 2B2C+4E=1
A+B+C+D=0
2B2C2D+E=0
B+C+4D2E=0 Janice Cotcher lui répond. 





Cows and chickens 
20080616 

damebochie pose la question : I got this problem and want to write a system of equation for it:
Farmer Joe has cows and chickens on his farm. One day he count 76 legs and 24 heads. How many cows and how many chickens are on the farm? write a system of equations and solve.
I don't have any problem to solve it, but I just can;t see how I am going to write this system of equation.
Thank you so much for helping? Harley Weston lui répond. 





System of equations 
20071206 

Jenn pose la question : change the equation,xy=4 to form y=mx+b
the solution to the system of equations y=2x and y=x+3 is Stephen La Rocque lui répond. 





Chicken and goat feet 
20071205 

Kim pose la question : Old McDonald raises goats and chickens. The animals have a total of
100 heads adn 360 feet. How many goats and how many chickens does Mr.
McDonald have? Stephen La Rocque and Penny Nom lui répond. 





Four triangles in a square 
20071015 

Kristina pose la question : A square with side lengths of 6 cm is divided into 3 right triangles and a larger isosceles triangle. If the three right triangles have equal area, find the exact area of the isosceles triangle. Stephen La Rocque lui répond. 





Substitution method 
20071011 

Kevin pose la question : 3xx+2y=36y=11 Stephen La Rocque lui répond. 





Solving four simultaneous equations (system of four linear equations) 
20071007 

Johan pose la question : I need some help in solving this question
x + 2y  3z + 4w = 12
2x + 2y  2z + 3w = 10
0 + y + z + 0 = 1
x  y + z  2w = 4 Stephen La Rocque lui répond. 





Two equations in two unknowns 
20070914 

CAMEILA pose la question : NEED T0 SOLVE THIS EQUATION
Y = 2X + 6
Y + 6 = 2x Stephen La Rocque lui répond. 





What happens when you have zero's on both sides? 
20070605 

Lily pose la question : On the substitution method what happens when you have zero's on both
sides of the equation? Is that considered no solution or infinitely many? Stephen La Rocque and Penny Nom lui répond. 





System of equations 
20070524 

Chris pose la question : Find all real solutions (x,y,z,w) of the system of equations:
2y= x + x/17, 2z= y + y/17, 2w = z + z/17, 2x= w + w/17 Penny Nom lui répond. 





A system of equations 
20061113 

Katrina pose la question : solve the system of equations using either the substitution or the elimination method. 2x3y= 12 and 4x+6y=15 Penny Nom lui répond. 





Simultaneous Equations 
20051221 

Matt pose la question : I have these two equations,
336 = 60a + 10b
and
432 = 84a + 6b
Am I right in saying both a and b are 4.8? Penny Nom lui répond. 





y = x+2 and y = 2x  1 
20050503 

Kimberley pose la question : Question:
y=x+2
y=2x1 Penny Nom lui répond. 





The substitution method 
20041128 

A student pose la question : I Was working and i ran into this problem can you help me solve it using the substitution method?
3x2y=10
x+5y=27 Penny Nom lui répond. 





Solve for a and t 
20041023 

Justin pose la question : How do I solve for "a" and "t" in the equations:
1000t= 4000 + 2000t + (1/2)at^2
1000=2000 + at Penny Nom lui répond. 





Graph question 
19980512 

Rose Seminary pose la question : Why is the point of intersection of two lines the solution to the corresponding system of equations? Penny Nom lui répond. 

