30=4x-x

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Solution for 30=4x-x equation: 



30=4x-x

We move all terms to the left:

30-(4x-x)=0

We add all the numbers together, and all the variables

-(+3x)+30=0

We get rid of parentheses

-3x+30=0

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

-3x=-30

x=-30/-3

x=+10

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