100=x-x*0.2

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Solution for 100=x-x*0.2 equation: 



100=x-x*0.2

We move all terms to the left:

100-(x-x*0.2)=0

We add all the numbers together, and all the variables

-(+x-x*0.2)+100=0

We get rid of parentheses

-x+x*0.2+100=0

We add all the numbers together, and all the variables

-1x+x*0.2+100=0

Wy multiply elements

-1x+0.2x+100=0

We add all the numbers together, and all the variables

-0.8x+100=0

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

-0.8x=-100

x=-100/-0.8

x=+125

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