Question

ajudinha se conseguir colocar a conta agradeço:) ​

Answer 1

Resposta:

A) 2/4 = 3/x

2x = 3 x 4

2x = 12

x = 12/2

x = 6

B) 4/12 = x/21

12x = 4 x 21

12x = 84

x = 84/12

x = 7

C) 9/x = 18/4

18x = 9 x 4

18x = 36

x = 2

D) 8/2x - 6 = 12/x + 1

8 (x + 1) = 12 (2x - 6)

8x + 8 = 24x - 72

8x - 24x = -72 - 8

-16x = - 80 x (-1)

16x = 80

x = 80/16

x = 5