9x-(3x-21)=63

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Solution for 9x-(3x-21)=63 equation: 



9x-(3x-21)=63

We move all terms to the left:

9x-(3x-21)-(63)=0

We get rid of parentheses

9x-3x+21-63=0

We add all the numbers together, and all the variables

6x-42=0

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

6x=42

x=42/6

x=7

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