Question

atividade resolva as contas mmc​

Answer 1

Resposta:

j)

$\dfrac{4x}{3} + \dfrac{x}{4} = \dfrac{3}{2} \\ \\ \dfrac{4 \times 4x + 3x = 6 \times 3}{12} \\ \\ 16x + 3x = 18 \\ \\ 19x = 18 \\ \\ \green{x = \dfrac{18}{19} }$

k)

$\dfrac{2}{5} - \dfrac{3x}{2} = x \\ \\ \dfrac{2 \times2 - 5 \times 3x = 10x}{10} \\ \\ 4 - 15x = 10x \\ \\ 4 = 10x + 15x \\ \\ 4 = 25x \\ \\ \green{ x = \dfrac{4}{25} }$

l)

$\dfrac{6x}{5} - \dfrac{1}{4} = \dfrac{x}{2} \\ \\ \dfrac{4 \times 6x - 5 \times 1 = 10x}{20} \\ \\24x - 5 = 10x \\ \\ 24x - 10 x = 5 \\ \\ 14x = 5 \\ \\ \green{x = \dfrac{5}{14} }$

Bons Estudos!