12w-9=21

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Solution for 12w-9=21 equation: 



12w-9=21

We move all terms to the left:

12w-9-(21)=0

We add all the numbers together, and all the variables

12w-30=0

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

12w=30

w=30/12

w=2+1/2

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