Question

algum humano me ajuda pfvrr ​

Answer 1

Resposta:

4.

a)60=5x

5x=60

x=60/5

x=12

b)4x=7.12

4x=84

x=84/4

x=21

c)3x=90

×=90/3

x=30

d)240=12x

12x=240

x=240/12

x=20