Question

Resolva as equações:
a. 3 (x – 1 ) – 7 = 15
b. (x – 3) – (x + 2) + 2 (x – 1) – 5 = 0
c. 2x + 3x + 9 = 8(6 – x)
d. 5x + 7 = 4x + 10
e. 9x + 9 + 3x = 15

Answer 1

Resposta:

e 32 meo amigo

espero ter ajudado

Explicação passo-a-passo:

Answer 2

Olá!

a)

3 (x – 1 ) – 7 = 15

3x - 3 -7 = 15

3x - 10 = 15

3x = 15 + 10

x = 25/3

b)

(x – 3) – (x + 2) + 2 (x – 1) – 5 = 0

(x – 3) – (x + 2) + 2x - 2 – 5 = 0

x - 3 - x - 2 + 2x - 2 - 5 = 0

2x - 12 = 0

2x = 12

x = 12/2

x = 6

c)

2x + 3x + 9 = 8(6 – x)

2x + 3x + 9 = 48 - 8x

2x + 3x + 8x = 48 - 9

13x = 39

x = 39/13

x = 3

d)

5x + 7 = 4x + 10

5x - 4x = 10 - 7

x = 3

e)

9x + 9 + 3x = 15

9x + 3x = 15 - 9

12x = 6

x = 6/12

x = 1/2

:)