-3(3y-7)=21-9y

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Solution for -3(3y-7)=21-9y equation:


-3(3y-7)=21-9y

We simplify the equation to the form, which is simple to understand 
-3(3y-7)=21-9y

Reorder the terms in parentheses
+(-9y+21)=21-9y

Remove unnecessary parentheses
-9y+21=+21-9y

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

We simplify left and right side of the equation. 
y=0

0=0

This equation is an identity, so all real numbers are solutions.

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