12x+13-15x+20=12

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Solution for 12x+13-15x+20=12 equation: 



12x+13-15x+20=12

We move all terms to the left:

12x+13-15x+20-(12)=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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