(6x+9-3x)=5x+21

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Solution for (6x+9-3x)=5x+21 equation: 



(6x+9-3x)=5x+21

We move all terms to the left:

(6x+9-3x)-(5x+21)=0

We add all the numbers together, and all the variables

(3x+9)-(5x+21)=0

We get rid of parentheses

3x-5x+9-21=0

We add all the numbers together, and all the variables

-2x-12=0

We move all terms containing x to the left, all other terms to the right

-2x=12

x=12/-2

x=-6

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