Question

Alguém resolve pra mim por favor ?


a) x - 3 = 9
b) 4x - 9 = 1 - 2x
c) x + 5 = 20 - 4x
d) 9x - 4x + 10 = 7x - 30

Answer 1

Resposta:

a) x = 12

b) 6x = 10

c) x = 3

d) x = 20

Answer 2

a) x = 12
b) 6x = 10
c) 5x = 15
d) -2x = -40