Question

calcule metado de adiçao 4x-y=8 2x+3y=4

Answer 1

{ 4x-y=8(3)
{2x+3y=4

{12x-3y=24
{2x+3y=4 anulamos o y
14x=28
x=28÷14
x=2

4x-y=8
4(2)-y=8
8-y=8
-y= 8-8
-y= 0(-1)
y=0

S: { 2, 0 }