Question

Resolva as equações do 1º grau:

a) - (x – 4) – (6 + x) = 3x – 4  




b)  8x - (x + 2) + (x + 4) - (x + 6) = 52

c)  3 – 3(x + 3) = x – 18                     






d)  50 + (3x − 4) = - (3x – 4) + 12​

Answer 1

Resposta:

A ) - (x - 4 ) - (6 + x) = 3x - 4

- x + 4 - 6 - x = - 12

- 2x - 2 = - 12

- 2x = - 12 + 2

- 2x = - 10

10 ÷ 2

x = 5

B ) 8x - (x + 2) + ( x + 4 ) - ( x + 6 ) = 52

8x - x - 2 + x + 4 - x - 6 = 52

7x = 52 + 4

7x = 56

56 ÷ 7

X = 8

C ) 3 - 3 (x + 3) = x - 18

3 - 3x - 9 = x - 18

- 6 - 3 x = x - 18

- 3x - x = - 18 + 6

12 ÷ 4x

X = 3

D) 50 + (3x − 4) = - (3x – 4) + 12

50 + 3x - 4 = - 3x + 4 + 12

46 + 3x = - 3x + 16

- 30 ÷ 6 x

X = - 5

Explicação passo-a-passo:

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