Question

a) 14 -5x = 9x -8
b) 17x +4 -5x +8 = 13x -4 -9x +5
c) 10 -9x + 13x = 17x +5 -8x
d) -4x +5 -6x +8x= 7 -3x +4
e) -5x +8 = 9


me ajudem pfvr ;-;​

Answer 1

Resposta:

a) 1,57...; b) 1,375; c) 1; d) 6; e) 0,2.

Explicação passo a passo:

a) 14 - 5x = 9x - 8

- 5x - 9x = - 8 - 14

- 14x = - 22  .(-1)

14x = - 22

x = - 22 : 14

x = 1,57...

b) 17x + 4 - 5x + 8 = 13x - 4 - 9x + 5

17x - 5x - 13x + 9x = - 4 + 5 - 4 - 8

12x - 4x = 1 - 12

8x = - 11

x = - 11 : 8

x = 1,375.

c) 10 - 9x + 13x = 17x + 5 - 8x

- 9x + 13x - 17x + 8x = 5 - 10

4x - 9x = - 5

- 5x = - 5  .(-1)

5x = 5

x = 5 : 5

x = 1.

d) - 4x + 5 - 6x + 8x= 7 - 3x + 4

- 4x - 6x + 8x + 3x = 7 + 4 - 5

- 10x + 11x = 11 - 5

x = 6.

e) - 5x + 8 = 9

- 5x = 9 - 8

- 5x = 1  .(-1)

5x = 1

x = 1 : 5

x = 0,2.