100=30+w

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Solution for 100=30+w equation: 



100=30+w

We move all terms to the left:

100-(30+w)=0

We add all the numbers together, and all the variables

-(w+30)+100=0

We get rid of parentheses

-w-30+100=0

We add all the numbers together, and all the variables

-1w+70=0

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

-w=-70

w=-70/-1

w=+70

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