x+12=2*x+3

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Solution for x+12=2*x+3 equation: 



x+12=2x+3

We move all terms to the left:

x+12-(2x+3)=0

We get rid of parentheses

x-2x-3+12=0

We add all the numbers together, and all the variables

-1x+9=0

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

-x=-9

x=-9/-1

x=+9

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