.30(12)+.05x=.10(6+x)

Solution for .30(12)+.05x=.10(6+x) equation:

.30(12)+.05x=.10(6+x)

We simplify the equation to the form, which is simple to understand 
.30(12)+.05x=.10(6+x)

Reorder the terms in parentheses
+(+3.6)+.05x=.10*(6+x)

Remove unnecessary parentheses
+3.6+.05x=+.10+*(+6+x+)

Reorder the terms in parentheses
+3.6+.05x=+( + 0.6 + 0.1x)

Remove unnecessary parentheses
+3.6+.05x=0.6 + 0.1x

We move all terms containing x to the left and all other terms to the right. 
 + 0.05x-0.1x=0.6-3.6

We simplify left and right side of the equation. 
-0.05x=-3

We divide both sides of the equation by -0.05 to get x. 
x=60