30=7x-2x

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Solution for 30=7x-2x equation: 



30=7x-2x

We move all terms to the left:

30-(7x-2x)=0

We add all the numbers together, and all the variables

-(+5x)+30=0

We get rid of parentheses

-5x+30=0

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

-5x=-30

x=-30/-5

x=+6

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