Question

A) 3(x+4)+8=2+M




B) x/2-2/3=5x/6

Answer 1

Resposta:

$\sf{segue \: abaixo \: a \: resposta}$

Explicação passo-a-passo:

A)

$\sf{3(x+4)+8=2+M}$

$\sf{3x + 12 + 8 = 2 +M }$

$\sf{3x + 20 = 2 + M}$

$\sf{3x = 2 + M - 20}$

$\sf{2 - 20 = - 18}$

$\sf{ 3x = - 18 +M }$

$\sf{x = - 6 + \frac{1}{3}M }$

$\boxed{\boxed{{\sf{x = \frac{1}{3} M - 6}}}}$

B)

$\sf{x/2-2/3=5x/6}$

$\sf{ \frac{x}{2} - \frac{2}{3} = \frac{5x}{6} }$

$\sf{3x - 4 = 5x}$

$\sf{3x = 5x + 4}$

$\sf{3x - 5x = 4}$

$\sf{ - 2x = 4}$

$\sf{4 \div 2 = 2}$

$\boxed{\boxed{{\sf{x = - 2}}}}$

Answer 2

Explicação passo-a-passo:

$a)3.(x + 4) + 8 = 2$

$3x + 12 + 8 = 2 \\ 3x = 2 - 8 - 12 \\ 3x = - 18 \\ x = \frac{ - 18}{3}$

$x = - 6$

$b) \frac{x}{2} - \frac{2}{3} = \frac{5x}{6}$

$mmc = 6$

$3x - 4 = 5x \\ 3x - 5x = 4 \\ - 2x = 4 \times ( - 1) \\ \\ 2x = - 4 \\ x = \frac{ - 4}{2}$

$x = - 2$