Question

atividade resolva as contas mmc​

Answer 1

Resposta:

d)

$\dfrac{1}{6} - \dfrac{x}{2} = \dfrac{ - 2x}{3} + \dfrac{1}{4} \\ \\ \frac{2 \times 1 - 6x = - 4 \times 2x + 3 \times 1}{12} \\ \\ 2 - 6x = - 8x + 3 \\ \\ - 6x + 8x = 3 - 2 \\ \\ 2x = 1 \\ \\ \green{ x = \dfrac{1}{2} }$

e)

$\dfrac{3x}{8} - \dfrac{5}{6} = \dfrac{x}{3} - \dfrac{5}{2} \\ \\ \frac{3 \times 3x - 4 \times 5 = 8x - 12 \times 5}{24} \\ \\ 9x - 20 = 8x - 60 \\ \\ 9 x - 8x = - 60 + 20 \\ \\ \green{ x = - 40}$

f)

$\dfrac{x}{2} + \dfrac{2x}{3} = 7 \\ \\ \frac{3x + 2 \times 2x = 6 \times 7}{6} \\ \\ 3x + 4x = 42 \\ \\ 7x = 42 \\ \\ x = \frac{42}{7} \\ \\ \green{x = 6}$

Bons Estudos!

Answer 2

Explicação passo-a-passo:

Resolução!!!

$d)$

$\dfrac{1}{6} - \dfrac{x}{2} = - \dfrac{2x}{3} + \dfrac{1}{4}$

$2 - 6x = - 8x + 3$

$- 6x + 8x = 3 - 2$

$2x = 1$

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

$e)$

$\dfrac{3x}{8} - \dfrac{5}{6} = \dfrac{x}{3} - \dfrac{5}{2}$

$9x - 20 = 8x - 60$

$9x - 8x = - 60 + 20$

$x = - 40$

$f)$

$\dfrac{x}{2} + \dfrac{2x}{3} = 7$

$3x + 4x = 42$

$7x = 42$

$x = \dfrac{42}{7}$

$x = 6$

Espero ter ajudado!