3(3+x)=21+x

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Solution for 3(3+x)=21+x equation:


3(3+x)=21+x

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

Reorder the terms in parentheses
+(+9+3x)=21+x

Remove unnecessary parentheses
+9+3x=+21+x

We move all terms containing x to the left and all other terms to the right. 
+3x-1x=+21-9

We simplify left and right side of the equation. 
+2x=+12

We divide both sides of the equation by 2 to get x. 
x=6

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