Verified answer

Resposta:

a) 4x - 100 = 2x + 10

4x - 2x = 10 + 100

2x = 110

x = 110/2

x = 55

b) x + 78 = 180

x = 180 - 78

x = 102

c) x + 15 = 40

x = 40 - 15

x = 25

d) 2x + 10 + x - 10 = 180

3x = 180

x = 180/3

x = 60

e) 5x + x + 36 = 180

6x = 180 - 36

6x = 144

x = 144/6

x = 24

f) 2x - 60 = 60

2x = 60 + 60

2x = 120

x = 120/2

x = 60

Explicação passo a passo: