Question

A) {X=y-5
2x-y=8

B) {x-y=5
x=2y+1

Urgenteee, quem puder mim ajudar pfvr

Answer 1

a) x = y - 5
2x - y = 8

2(y - 5) - y = 8
2y - 10 - y = 8
y = 18

x = y - 5
x = 18 - 5
x = 13

b) x - y = 5
x = 2y + 1

2y + 1 - y = 5
y = 5 - 1
y = 4

x - y = 5
x - 4 = 5
x = 9