Teachers and parrents

Instructions:

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

Example

4 . x + 4 . y=-8
-4 . x + 4 . y=16
=
=
=
x=
y=
Correctness test
4 . + 4 . =-8
-4 . + 4 . =16

Solution

4 . x + 4 . y=-8
-4 . x + 4 . y=16
x=-3
y=1

Solve exercises