42=2x+12

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Solution for 42=2x+12 equation: 



42=2x+12

We move all terms to the left:

42-(2x+12)=0

We get rid of parentheses

-2x-12+42=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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