3.5=x+2x

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Solution for 3.5=x+2x equation: 



3.5=x+2x

We move all terms to the left:

3.5-(x+2x)=0

We add all the numbers together, and all the variables

-(+3x)+3.5=0

We get rid of parentheses

-3x+3.5=0

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

-3x=-3.5

x=-3.5/-3

x=1+0.5/3

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