Sujet: 2 unknowns liste de sujets
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	Can one equation with two variables be solved algebraically?		2019-08-30
		Don pose la question : Can one equation with two variables be solved algebraically? Penny Nom lui répond.
	A system of equations		2013-08-13
		Nina pose la question : 3x-2y=8 -x+3y=5 What is the solution of the system of equations Penny Nom lui répond.
	The substitution method		2009-02-06
		amber pose la question : Pleasse help me with this problem x+y=-2 y-2x=1 Penny Nom lui répond.

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