100=20+2x

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Solution for 100=20+2x equation: 



100=20+2x

We move all terms to the left:

100-(20+2x)=0

We add all the numbers together, and all the variables

-(2x+20)+100=0

We get rid of parentheses

-2x-20+100=0

We add all the numbers together, and all the variables

-2x+80=0

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

-2x=-80

x=-80/-2

x=+40

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