X-12=45-x

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Solution for X-12=45-x equation: 



X-12=45-X

We move all terms to the left:

X-12-(45-X)=0

We add all the numbers together, and all the variables

X-(-1X+45)-12=0

We get rid of parentheses

X+1X-45-12=0

We add all the numbers together, and all the variables

2X-57=0

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

2X=57

X=57/2

X=28+1/2

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