(5x-15)=(2x+21)

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Solution for (5x-15)=(2x+21) equation: 



(5x-15)=(2x+21)

We move all terms to the left:

(5x-15)-((2x+21))=0

We get rid of parentheses

5x-((2x+21))-15=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-21-15=0

We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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