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)+21)=0

We add all the numbers together, and all the variables

-6(w-3)-(3(-3w-5)+21)+12=0

We multiply parentheses

-6w-(3(-3w-5)+21)+18+12=0



We calculate terms in parentheses: -(3(-3w-5)+21), so:

3(-3w-5)+21

We multiply parentheses

-9w-15+21

We add all the numbers together, and all the variables

-9w+6

Back to the equation:

-(-9w+6)



We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

3w+24=0

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

3w=-24

w=-24/3

w=-8

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