100=x+2x+4x

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Solution for 100=x+2x+4x equation: 



100=x+2x+4x

We move all terms to the left:

100-(x+2x+4x)=0

We add all the numbers together, and all the variables

-(+7x)+100=0

We get rid of parentheses

-7x+100=0

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

-7x=-100

x=-100/-7

x=14+2/7

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