100=(9+x)*8

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Solution for 100=(9+x)*8 equation: 



100=(9+x)*8

We move all terms to the left:

100-((9+x)*8)=0

We add all the numbers together, and all the variables

-((x+9)*8)+100=0



We calculate terms in parentheses: -((x+9)*8), so:

(x+9)*8

We multiply parentheses

8x+72

Back to the equation:

-(8x+72)



We get rid of parentheses

-8x-72+100=0

We add all the numbers together, and all the variables

-8x+28=0

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

-8x=-28

x=-28/-8

x=3+1/2

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