Question

resolva a equaçao


2x+8y=16
4x-y=15

Answer 1

{2x+8y=16
{4x-y=15

-y=15-4x
y=-15+4x

2x+8(-15+4x)=16
2x-120+32x=16
2x+32x=16+120
34x=136
x=136/34
x=4

y=-15+4.4
y=-15+16
y=1

espero ajudar♥