210=2x+x

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Solution for 210=2x+x equation: 



210=2x+x

We move all terms to the left:

210-(2x+x)=0

We add all the numbers together, and all the variables

-(+3x)+210=0

We get rid of parentheses

-3x+210=0

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

-3x=-210

x=-210/-3

x=+70

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