Question

me ajudem gente,eu não entendi​

Answer 1

Resposta:

a) 2; b) 5; c) 15; d) 13; e) 15; f) 3.

Explicação passo-a-passo:

a) x/6 = x + 3/15

x . 15 = 6( x + 3)

15x = 6x + 18

15x - 6x = 18

9x = 18

x = 18 : 9

x = 2.

b) x - 2/x = 12/20

20(x - 2) = 12 . x

20x - 40 = 12x

20x - 12x = 40

8x = 40

x = 40 : 8

x = 5.

c) x - 3/x = 4/5

(x - 3) . 5 = x . 4

5x - 15 = 4x

5x - 4x = 15

x = 15.

d) x -4/18 = 1/2

(x - 4) . 2 = 18 . 1

2x - 8 = 18

2x = 18 + 8

2x = 26

x = 26 : 2

x = 13.

e) 2/1 = 15 - x/x

2 . x = 1 (15 - x)

2x = 15 - x

2x - x = 15

x = 15.

f) 6/10 = x/x + 2

6(x + 2) = 10 . x

6x + 12 = 10x

6x - 10x = - 12

- 4x = - 12  .(-1)

4x = 12

x = 12 : 4

x = 3.