6w-21=-9(w+9)

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Solution for 6w-21=-9(w+9) equation: 



6w-21=-9(w+9)

We move all terms to the left:

6w-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

6w+9w+81-21=0

We add all the numbers together, and all the variables

15w+60=0

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

15w=-60

w=-60/15

w=-4

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