x+30=2x+42

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Solution for x+30=2x+42 equation: 



x+30=2x+42

We move all terms to the left:

x+30-(2x+42)=0

We get rid of parentheses

x-2x-42+30=0

We add all the numbers together, and all the variables

-1x-12=0

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

-x=12

x=12/-1

x=-12

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