9=10x-(9x-7)

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Solution for 9=10x-(9x-7) equation: 



9=10x-(9x-7)

We move all terms to the left:

9-(10x-(9x-7))=0



We calculate terms in parentheses: -(10x-(9x-7)), so:

10x-(9x-7)

We get rid of parentheses

10x-9x+7

We add all the numbers together, and all the variables

x+7

Back to the equation:

-(x+7)



We get rid of parentheses

-x-7+9=0

We add all the numbers together, and all the variables

-1x+2=0

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

-x=-2

x=-2/-1

x=+2

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