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))+12+21)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

-6w-(3(-3w+5))+18=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 get rid of parentheses

-6w+9w-15+18=0

We add all the numbers together, and all the variables

3w+3=0

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

3w=-3

w=-3/3

w=-1

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