x-(4x-7)=5x-x+21)

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Solution for x-(4x-7)=5x-x+21) equation: 



x-(4x-7)=5x-x+21)

We move all terms to the left:

x-(4x-7)-(5x-x+21))=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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