123-3x=12

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Solution for 123-3x=12 equation: 



123-3x=12

We move all terms to the left:

123-3x-(12)=0

We add all the numbers together, and all the variables

-3x+111=0

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

-3x=-111

x=-111/-3

x=+37

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