3(x-3)+21=3x+12

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Solution for 3(x-3)+21=3x+12 equation:


3(x-3)+21=3x+12

We simplify the equation to the form, which is simple to understand 
3(x-3)+21=3x+12

Reorder the terms in parentheses
+(+3x-9)+21=3x+12

Remove unnecessary parentheses
+3x-9+21=+3x+12

We move all terms containing x to the left and all other terms to the right. 
+3x-3x=+12+9-21

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

0=0

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

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