Question

Mim ajudem.......●●●●

Answer 1

5x-2y=4
x+y=5

x=5-y


5(5-y)-2y=4
25-5y-2y=4
25-7y=4
25-4=7y
21=7y
y=3

x=5-3
x=2


y=3 e x=2