3(7-x)=

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Solution for 3(7-x)= equation:


3(7-x)=0

We simplify the equation to the form, which is simple to understand 
3(7-x)=0

Reorder the terms in parentheses
+(+21-3x)=0

Remove unnecessary parentheses
+21-3x=0

We move all terms containing x to the left and all other terms to the right. 
-3x=0-21

We simplify left and right side of the equation. 
-3x=-21

We divide both sides of the equation by -3 to get x. 
x=7

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