0.6(10,000)+0.8x=0.72(10,000+x)

Solution for 0.6(10,000)+0.8x=0.72(10,000+x) equation:

0.6(10,000) + 0.8x=0.72(10,000+x)

We simplify the equation to the form, which is simple to understand 
0.6(10,000) + 0.8x=0.72(10,000+x)

Reorder the terms in parentheses
+(+6) + 0.8x=0.72*(10,000+x)

Remove unnecessary parentheses
+6 + 0.8x=0.72+*(+10,000+x+)

Reorder the terms in parentheses
+6 + 0.8x=+(+7.2 + 0.72x)

Remove unnecessary parentheses
+6 + 0.8x=+7.2 + 0.72x

We move all terms containing x to the left and all other terms to the right. 
 + 0.8x-0.72x=+7.2-6

We simplify left and right side of the equation. 
 + 0.08x=+1.2

We divide both sides of the equation by 0.08 to get x. 
x=15