Question

Resolva:
a)X-4/5x-12=20x-1/4x-2/3
pra hj!!

Answer 1

Resolução:

$x- \frac{4}{5x} -12 = 20x- \frac{1}{4x}$

$mmc(3,4,5)=60$

$\frac{60x-48x-720}{6} = \frac{1.200x-15x-40}{60}$

Eliminando denominador 60:

60x-48x-720=1.200x-15x-40
60x-48x-1.200x +15x=-40+720
-1.173x=680
1.173x=- 680
$x=- \frac{680}{1.173} : 17 = \frac{40}{69}$
$x= -\frac{40}{69}$

Bons Estudos :)