Question

a raiz da equação 3x+5 sobre dois menos 2x-8 sobre 3 igual a cinco

Answer 1

$\dfrac{3x + 5}{2} - \dfrac{2x - 8}{3} = 5 \\ \\ \\ MMC ~de ~2, ~ 3 = 6 \\ \\ \\ \dfrac{3(3x + 5) - 2(2x - 8)} {6} = 5 . 6 \\ \\ \\ \dfrac{9x + 15 - 4x + 16}{6} = 30 \\ \\ \\ \dfrac{5x + 31}{6} = 30 \\ \\ \\ 5x + 31 = 30 \\ \\ 5x = 30 - 31 \\ \\ 5x = -1 \\ \\ \\ =\ \textgreater \ x = -\dfrac{1}{5}$