100-x=20+0.5x

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Solution for 100-x=20+0.5x equation: 



100-x=20+0.5x

We move all terms to the left:

100-x-(20+0.5x)=0

We add all the numbers together, and all the variables

-x-(0.5x+20)+100=0

We add all the numbers together, and all the variables

-1x-(0.5x+20)+100=0

We get rid of parentheses

-1x-0.5x-20+100=0

We add all the numbers together, and all the variables

-1.5x+80=0

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

-1.5x=-80

x=-80/-1.5

x=53+0.5/1.5

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