Question

Alguém me ajuda pfvr?

Answer 1

d) x + 2x + x+40 = 90

4x= 90 - 40

x= 50/4

x= 12,5

e) x +  x+20 + 2x + x= 90

5x= 90 - 20

x= 70/5

x= 14

f) x + x+15 + x= 90

3x= 90 - 15

x= 75/3

x= 25