3-x=12-12

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Solution for 3-x=12-12 equation: 



3-x=12-12

We move all terms to the left:

3-x-(12-12)=0

We add all the numbers together, and all the variables

-x+3-0=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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