21-15=3(x-7)

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Solution for 21-15=3(x-7) equation:


21-15=3(x-7)

We simplify the equation to the form, which is simple to understand 
21-15=3(x-7)

Reorder the terms in parentheses
21-15=+(+3x-21)

Remove unnecessary parentheses
+21-15=+3x-21

We move all terms containing x to the left and all other terms to the right. 
-3x=-21-21+15

We simplify left and right side of the equation. 
-3x=-27

We divide both sides of the equation by -03 to get x. 
x=9

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