100=81-2w

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Solution for 100=81-2w equation: 



100=81-2w

We move all terms to the left:

100-(81-2w)=0

We add all the numbers together, and all the variables

-(-2w+81)+100=0

We get rid of parentheses

2w-81+100=0

We add all the numbers together, and all the variables

2w+19=0

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

2w=-19

w=-19/2

w=-9+1/2

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