Question

13 sobre 12 + 6x sobre 4 mais 9 x menos 4 igual a 13×

Answer 1

$\frac{13}{12} + \frac{6x}{4} +9x-4=13x$

$\frac{13+18x+108x-48}{12} = \frac{156}{12}$


$x= \frac{191}{106}$

Answer 2

13/12 + 6x/4 + 9x - 4 = 13x
m.m.c = 12
13 + 18x + 108x - 48 = 156x
-30x = 35
x = -35/30  ⇒ x = -7/6