Question

Resolva as equações
a) x/4+1=3
b) -2x-1 = -3​

Answer 1

Resposta:

a) x/4 + 1 = 3

4 . x + 4/4 = 4 . 3

x + 4 = 4 . 3

x + 4 = 12

x = 8

b) -2x - 1 = -3​

-2x = -2

x = 2/2

x = 1

Answer 2

Explicação passo-a-passo:

$4) \frac{x}{4} + 1 = 3 \: \: \: mmc = 4$

$x + 4 = 12 \\ x = 12 - 4 \\ x = 8$

$b) - 2x - 1 = - 3 \\ - 2x = - 3 + 1 \\ - 2x = - 2 \: \times ( - 1)$

$2x = 2 \\ x = \frac{2}{2} = 1$