(50 - 6x) . 18 = 23 . 32 . 5
(50 - 6x) . 18 = 3680
50 - 6x = 3680 : 18
50 - 6x = $\frac{1840}{9}$
6x = 50 - $\frac{1840}{9}$
6x = $\frac{450}{9}$ - $\frac{1840}{9}$
6x = $\frac{-1390}{9}$
x = $\frac{-1390}{9}$ : 6
x = $\frac{-1390}{9}$ . $\frac{1}{6}$
x = $\frac{-695}{27}$