Question

ME AJUDEM A CALCULAR
0.3x – (0.1x + 2) = 3.4​

Answer 1

Resposta:

$x = 27$

Explicação passo-a-passo:

$0.3x - (0.1x + 2) = 3.4$

Expandir:

$0.3x - (0.1x + 2)\\\\- (0.1x + 2)$

Coloque os parênteses:

$-(0.1x) - (2)$

Aplique a regra dos sinais:

$-0.1x - 2\\\\0.3x -0.1x - 2$

Some elementos similares:

$0.2x - 2\\\\0.2x - 2 = 3.4$

Adicione 2 a ambos dos lados:

$0.2x - 2 + 2 = 3.4 + 2$

Simplifique:

$0.2x = 5.4$

Divida ambos os lados por 0.2

$\frac{0.2x}{0.2} = \frac{5.4}{0.2}$

Faça a conta:

$x = 27$