Question

3x-45,2x+10,2x+15 e x + 20?

Answer 1

Oi

3x - 45 = 0

3x =45

x = 45/3 ÷ 3

x = 15

2x + 10 = 0

2x = - 10

x = - 10/2 ÷ 2

x = - 5

2x + 15 = 0

x = - 15/2

x + 20 = 0

x = - 20

Bons estudos.