(4x+9)=(6x+21)

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Solution for (4x+9)=(6x+21) equation: 



(4x+9)=(6x+21)

We move all terms to the left:

(4x+9)-((6x+21))=0

We get rid of parentheses

4x-((6x+21))+9=0



We calculate terms in parentheses: -((6x+21)), so:

(6x+21)

We get rid of parentheses

6x+21

Back to the equation:

-(6x+21)



We get rid of parentheses

4x-6x-21+9=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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