(5x-9)=(2x+21)

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Solution for (5x-9)=(2x+21) equation: 



(5x-9)=(2x+21)

We move all terms to the left:

(5x-9)-((2x+21))=0

We get rid of parentheses

5x-((2x+21))-9=0



We calculate terms in parentheses: -((2x+21)), so:

(2x+21)

We get rid of parentheses

2x+21

Back to the equation:

-(2x+21)



We get rid of parentheses

5x-2x-21-9=0

We add all the numbers together, and all the variables

3x-30=0

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

3x=30

x=30/3

x=10

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