Question

2(x+y)=5(x-y)
x/2 = y-2​

Answer 1

Resposta:

$\frac{x}{2}$=y-2

x=2.(y-2)

x=2y-4

2(x+y)=5(x-y)

Substituindo o x por 2y-4:

2.(2y-4+y)=5(2y-4-y)

4y-8+2y=10y-20-5y

6y-8=5y-20

6y-5y=-20+8

y=-12