Question

Calcule x e y

(I) 3x-y=2
(II) 2y-3x=2

Answer 1

{3x-y=2
{2y-3x=2
-y=2-3x
y=-2+3x
2(-2+3x)-3x=2
-4+6x-3x=2+4
6x-3x=6
3x=6
x=6/3
x=2
y=-2+3×2
y=-2+6
y=4
espero ajudar ♥