99=9(10+w)

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Solution for 99=9(10+w) equation: 



99=9(10+w)

We move all terms to the left:

99-(9(10+w))=0

We add all the numbers together, and all the variables

-(9(w+10))+99=0



We calculate terms in parentheses: -(9(w+10)), so:

9(w+10)

We multiply parentheses

9w+90

Back to the equation:

-(9w+90)



We get rid of parentheses

-9w-90+99=0

We add all the numbers together, and all the variables

-9w+9=0

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

-9w=-9

w=-9/-9

w=1

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