Question

PRECISO DA RESPOSTA URGENTE PFVR ME AJUDEM​

Answer 1

Resposta:

a)

x + y = -2

x = -2 -y

2x - y = 26

2.(-2 -y) - y = 26

-4 - 2y -y = 26

-3y = 26+4

-3y = 30

y= 30/-3

y= -10

x= -2 -(-10)

x= -2 + 10

x= 8

b)

-y = 7 - 5x .(-1)

y= -7 + 5x

2x + y = 7

2x -7 + 5x = 7

7x = 14

x = 14/7

x= 2

y = -7 + 5(2)

y= -7 + 10

y= 3