-9=3X+7-7x

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Solution for -9=3X+7-7x equation: 



-9=3X+7-7X

We move all terms to the left:

-9-(3X+7-7X)=0

We add all the numbers together, and all the variables

-(-4X+7)-9=0

We get rid of parentheses

4X-7-9=0

We add all the numbers together, and all the variables

4X-16=0

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

4X=16

X=16/4

X=4

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