-3w-21=9(w-9)

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Solution for -3w-21=9(w-9) equation: 



-3w-21=9(w-9)

We move all terms to the left:

-3w-21-(9(w-9))=0



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

9(w-9)

We multiply parentheses

9w-81

Back to the equation:

-(9w-81)



We get rid of parentheses

-3w-9w+81-21=0

We add all the numbers together, and all the variables

-12w+60=0

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

-12w=-60

w=-60/-12

w=+5

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