12x-(3x-9)=72

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Solution for 12x-(3x-9)=72 equation: 



12x-(3x-9)=72

We move all terms to the left:

12x-(3x-9)-(72)=0

We get rid of parentheses

12x-3x+9-72=0

We add all the numbers together, and all the variables

9x-63=0

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

9x=63

x=63/9

x=7

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