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6-3(3w-1)=90
We move all terms to the left:
6-3(3w-1)-(90)=0
We add all the numbers together, and all the variables
-3(3w-1)-84=0
We multiply parentheses
-9w+3-84=0
We add all the numbers together, and all the variables
-9w-81=0
We move all terms containing w to the left, all other terms to the right
-9w=81
w=81/-9
w=-9
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