(9x-3)+(3x+21)=12x+18

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Solution for (9x-3)+(3x+21)=12x+18 equation: 



(9x-3)+(3x+21)=12x+18

We move all terms to the left:

(9x-3)+(3x+21)-(12x+18)=0

We get rid of parentheses

9x+3x-12x-3+21-18=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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