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

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



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

We move all terms to the left:

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

We get rid of parentheses

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



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

-(x+21)

We get rid of parentheses

-x-21

We add all the numbers together, and all the variables

-1x-21

Back to the equation:

-(-1x-21)



We add all the numbers together, and all the variables

x-(-1x-21)+7=0

We get rid of parentheses

x+1x+21+7=0

We add all the numbers together, and all the variables

2x+28=0

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

2x=-28

x=-28/2

x=-14

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