Question

resolva as expressões do 1° grau sendo U=Q

Answer 1

b) 2x + $\frac{1}{5}$ - $\frac{x}{10}$ = $\frac{1}{2}$ + $\frac{8}{5}$
$\frac{20x}{10}$ + $\frac{2}{10}$ $\frac{-x}{10}$ = $\frac{5}{10}$ + $\frac{18}{10}$
20x + 2 -x = 5 + 18
20x -x = 5 + 18 -2
19x = 21
x = $\frac{21}{19}$




a) $\frac{2-x}{10} + \frac{x-5}{8} = \frac{-1}{2}$
    $\frac{8-4x}{40} + \frac{5x-25}{40} = \frac{-20}{40}$
    8 - 4x + 5x - 25 = -20
    -4x + 5x = -20 + 25 - 8
    x = 3