Question

ayuda con esta tarea xf ​

Answer 1

A)

9x - 4 = 2x

9x - 4 + 4 = 2x + 4

9x = - 2x + 4

9x + 2x = - 2x + 4 + 2x

9x + 2x = 4

(9 + 2)x = 11x

11x = 4

11x ÷ 11 = 4 ÷ 11

x = 4 ÷ 11

x = 4/11

x = 0,36

B)

7 (x - 5) - x = 3

7x - 35 - x = 3

6x - 35 = 3

6x = 3 + 35

6x = 38

6x ÷ 6 = 38 ÷ 6

6x = 38 ÷ 6

x = 38/6 = 38 ÷ 2/6 ÷ 2

x = 19/3

x = 6,3

C)

x + 5x = - 10 + 3

x + 5x

1x + 5x

(1 + 5)x = 6x

- 10 + 3

- (10 - 3) = - 7

6x = - 7

6x ÷ 6 = - 7 ÷ 6

x = - 7 ÷ 6

x = - 7/6

x = - 1.16

D)

- 3 (2x - 5) - 5x = 3x

- 6x + 15 - 5x = 3x

- 11x + 15 = 3x

- 11x - 3x = - 15

- 14x = - 15

- 14x ÷ (- 14) = - 15 ÷ (- 14)

x = - 15 ÷ (- 14)

x = 15 ÷ 14

x = 15/14

x = 1.0714285