100=x+0.4x

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Solution for 100=x+0.4x equation: 



100=x+0.4x

We move all terms to the left:

100-(x+0.4x)=0

We add all the numbers together, and all the variables

-(+1.4x)+100=0

We get rid of parentheses

-1.4x+100=0

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

-1.4x=-100

x=-100/-1.4

x=71+0.6/1.4

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