21=2x+7(x-6)

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Solution for 21=2x+7(x-6) equation:


21=2x+7(x-6)

We simplify the equation to the form, which is simple to understand 
21=2x+7(x-6)

Reorder the terms in parentheses
21=2x+(+7x-42)

Remove unnecessary parentheses
+21=+2x+7x-42

We move all terms containing x to the left and all other terms to the right. 
-2x-7x=-42-21

We simplify left and right side of the equation. 
-9x=-63

We divide both sides of the equation by -9 to get x. 
x=7

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