12-6(w-3)=3(-5-3w)=21

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Solution for 12-6(w-3)=3(-5-3w)=21 equation: 



12-6(w-3)=3(-5-3w)=21

We move all terms to the left:

12-6(w-3)-(3(-5-3w))=0

We add all the numbers together, and all the variables

-6(w-3)-(3(-3w-5))+12=0

We multiply parentheses

-6w-(3(-3w-5))+18+12=0



We calculate terms in parentheses: -(3(-3w-5)), so:

3(-3w-5)

We multiply parentheses

-9w-15

Back to the equation:

-(-9w-15)



We add all the numbers together, and all the variables

-6w-(-9w-15)+30=0

We get rid of parentheses

-6w+9w+15+30=0

We add all the numbers together, and all the variables

3w+45=0

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

3w=-45

w=-45/3

w=-15

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