Question

Alguém pode me ajudar nesta tarefa a/2+b/4+a/8-5b/2

Answer 1

$\dfrac{a}{2} + \dfrac{b}{4} + \dfrac{a}{8} - \dfrac{5b}{2}$

MMC de 2, 4, 8, 5 = 40

$\dfrac{20a + 10a +5a -5b . 20}{40} \\ \\ \\ \dfrac{10b +25a - 100b}{40} \\ \\ \\ \dfrac{25a - 90b}{40} \\ \\ \\ =\ \textgreater \ \dfrac{5a - 18b}{8}$