x+3=12.

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Solution for x+3=12. equation: 



x+3=12.

We move all terms to the left:

x+3-(12.)=0

We add all the numbers together, and all the variables

x+3-12=0

We add all the numbers together, and all the variables

x-9=0

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

x=9

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