12-30=4x

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Solution for 12-30=4x equation: 



12-30=4x

We move all terms to the left:

12-30-(4x)=0

We add all the numbers together, and all the variables

-4x-18=0

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

-4x=18

x=18/-4

x=-4+1/2

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