Question

2x-y=12
4x+2y=20
Me ajudem nessa incógnita

Answer 1

-y = 12 - 2x
y = -12 +2x

4x + 2(12 +2x) = 20
4x + 24 +4x = 20
8x = 20 -24
x = -4/8
x = -1/2

y = -12 + 2(-1/2)
y = -12 -1
y = -13