7x-3(-7)=21

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


7x-3(-7)=21

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

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

Remove unnecessary parentheses
+7x+21=+21

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

We simplify left and right side of the equation. 
+7x=0

We divide both sides of the equation by 7 to get x. 
x=0

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