Question

URGENTE!!!!!!!!!!!!!​

Answer 1

Resposta:

a)

x/20

5/4

4x=100

x=25

b)

1/3

x/60

3x=60

x=20

c)

2/3

20-x/x

2x=60-3x

5x=60

x=12

d)

7/3

(x+1)/39

3x+3=273

3x=270

x=90

Acredito que esteja certo