Teachers and parrents

Instructions:

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

Example

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

Solution

-1 . x - 2 . y=-1
1 . x - 1 . y=-2
x=-1
y=1

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