4x+21=13x-(4x+21)

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Solution for 4x+21=13x-(4x+21) equation: 



4x+21=13x-(4x+21)

We move all terms to the left:

4x+21-(13x-(4x+21))=0



We calculate terms in parentheses: -(13x-(4x+21)), so:

13x-(4x+21)

We get rid of parentheses

13x-4x-21

We add all the numbers together, and all the variables

9x-21

Back to the equation:

-(9x-21)



We get rid of parentheses

4x-9x+21+21=0

We add all the numbers together, and all the variables

-5x+42=0

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

-5x=-42

x=-42/-5

x=8+2/5

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