-243=-9(20+w)

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Solution for -243=-9(20+w) equation: 



-243=-9(20+w)

We move all terms to the left:

-243-(-9(20+w))=0

We add all the numbers together, and all the variables

-(-9(w+20))-243=0



We calculate terms in parentheses: -(-9(w+20)), so:

-9(w+20)

We multiply parentheses

-9w-180

Back to the equation:

-(-9w-180)



We get rid of parentheses

9w+180-243=0

We add all the numbers together, and all the variables

9w-63=0

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

9w=63

w=63/9

w=7

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