x-12=40x

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Solution for x-12=40x equation: 



x-12=40x

We move all terms to the left:

x-12-(40x)=0

We add all the numbers together, and all the variables

-39x-12=0

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

-39x=12

x=12/-39

x=-4/13

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