12-3(3w-5)=21

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



12-3(3w-5)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3(3w-5)-9=0

We multiply parentheses

-9w+15-9=0

We add all the numbers together, and all the variables

-9w+6=0

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

-9w=-6

w=-6/-9

w=2/3

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