Question

Resolva as equações:
a) 7x- 6 = 3 - 5x
b) 4x - 15 = 12 - 5x
c) 4 (X - 5) = 3 (x - 2)
d) 3n + 11 = 2 (n - 7)
e) 3 (x - 14) = 7 (x - 18)
f) 9x - 3 - 4x = 8x - 7 + x
g) 6 (5x - 2) - 5 (6x - 5) = 4 (9- 2x) + 1
URGENTE PFV​

Answer 1

Explicação passo-a-passo:

espero ter te ajudado na sua dúvida

Answer 2

Resposta:

Explicação passo-a-passo:

a) 7x - 6 = 3 - 5x

7x + 5x = 3+6

12x = 9 (:3)

4X = 3

X = 3/4

b) 4x - 15 = 12 - 5x

4x+5x = 12+15

9x = 27

X = 3

c) 4.(X - 5) = 3.(x - 2)

4x - 20 = 3x - 6

4x - 3x = - 6 + 20

X = 14

d) 3n + 11 = 2 (n - 7)

3n + 11 = 2n - 14

3n - 2n = - 14 - 11

n = - 25

e) 3.(x - 14) = 7.(x - 18)

3x - 42= 7x - 126

- 42 + 126 = 7x - 3x

84 = 4x

4x = 84

X = 84/4

X = 21

f) 9x - 3 - 4x = 8x - 7 + x

5x - 3 = 9x - 7

- 3 + 7 = 9x - 5x

4 = 4x

4x = 4

X = 4/4

X = 1

g) 6 (5x - 2) - 5 (6x - 5) = 4 (9- 2x) + 1

30x - 12 - 30x + 25 = 36 - 8x + 1

13 = 37 - 8x

8x = 37 - 13

8x = 24

X = 24/8

X = 3