400-20w=100+10w

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Solution for 400-20w=100+10w equation: 



400-20w=100+10w

We move all terms to the left:

400-20w-(100+10w)=0

We add all the numbers together, and all the variables

-20w-(10w+100)+400=0

We get rid of parentheses

-20w-10w-100+400=0

We add all the numbers together, and all the variables

-30w+300=0

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

-30w=-300

w=-300/-30

w=+10

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