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w/9-7=2
We move all terms to the left:
w/9-7-(2)=0
We add all the numbers together, and all the variables
w/9-9=0
We multiply all the terms by the denominator
w-9*9=0
We add all the numbers together, and all the variables
w-81=0
We move all terms containing w to the left, all other terms to the right
w=81
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