Question

a) – x = 9

b) – x = −2

c) 6x = 2x + 16

d) 5x + 6x − 16 = 3x + 2x − 4
e) 4(x + 10) − 2(x − 5) = 0

f) 5(x − 3) − 4(x + 2) = 2 + 3(1 − 2x)

g) 15 = −3x

h) −40 = −5x

desafio .​

Answer 1

Explicação passo-a-passo:

a)

-x = 9

x = -9

b)

-x = -2

x = 2

c)

6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16/4

x = 4

d)

5x + 6x - 16 = 3x + 2x - 4

11x - 16 = 5x - 4

11x - 5x = -4 + 16

6x = 12

x = 12/6

x = 2

e)

4.(x + 10) - 2.(x - 5) = 0

4x + 40 - 2x + 10 = 0

4x - 2x = -40 - 10

2x = -50

x = -50/2

x = -25

f)

5.(x - 3) - 4.(x + 2) = 2 + 3.(1 - 2x)

5x - 15 - 4x - 8 = 2 + 3 - 6x

x - 23 = 5 - 6x

x + 6x = 5 + 23

7x = 28

x = 28/7

x = 4

g)

15 = -3x

3x = -15

x = -15/3

x = -5

h)

-40 = -5x

5x = 40

x = 40/5

x = 8