2(3+x)=4(x-20)

Solution for 2(3+x)=4(x-20) equation:

2(3+x)=4(x-20)

We simplify the equation to the form, which is simple to understand 
2(3+x)=4(x-20)

Reorder the terms in parentheses
+(+6+2x)=4*(x-20)

Remove unnecessary parentheses
+6+2x=+4+*(+x-20+)

Reorder the terms in parentheses
+6+2x=+(+4x-80)

Remove unnecessary parentheses
+6+2x=+4x-80

We move all terms containing x to the left and all other terms to the right. 
+2x-4x=-80-6

We simplify left and right side of the equation. 
-2x=-86

We divide both sides of the equation by -2 to get x. 
x=43