x-(4x-7)=2x+3x-(x+21)

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Solution for x-(4x-7)=2x+3x-(x+21) equation: 



x-(4x-7)=2x+3x-(x+21)

We move all terms to the left:

x-(4x-7)-(2x+3x-(x+21))=0

We get rid of parentheses

x-4x-(2x+3x-(x+21))+7=0



We calculate terms in parentheses: -(2x+3x-(x+21)), so:

2x+3x-(x+21)

We add all the numbers together, and all the variables

5x-(x+21)

We get rid of parentheses

5x-x-21

We add all the numbers together, and all the variables

4x-21

Back to the equation:

-(4x-21)



We add all the numbers together, and all the variables

-3x-(4x-21)+7=0

We get rid of parentheses

-3x-4x+21+7=0

We add all the numbers together, and all the variables

-7x+28=0

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

-7x=-28

x=-28/-7

x=+4

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