9x-(3x-21)=75

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Solution for 9x-(3x-21)=75 equation: 



9x-(3x-21)=75

We move all terms to the left:

9x-(3x-21)-(75)=0

We get rid of parentheses

9x-3x+21-75=0

We add all the numbers together, and all the variables

6x-54=0

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

6x=54

x=54/6

x=9

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