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Equations of 2 unknowns

Mix

Instructions:

Solve a set of two equations with two unknowns and find out values of unknown variables x and y.

-2 . x + 1 . y	=	1
-1 . x + 1 . y	=	2
	=
	=
	=
x	=
y	=
Correctness test
-2 . + 1 .	=	1
-1 . + 1 .	=	2