42+12x=30+13x

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Solution for 42+12x=30+13x equation: 



42+12x=30+13x

We move all terms to the left:

42+12x-(30+13x)=0

We add all the numbers together, and all the variables

12x-(13x+30)+42=0

We get rid of parentheses

12x-13x-30+42=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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