12-7-4x=9

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Solution for 12-7-4x=9 equation: 



12-7-4x=9

We move all terms to the left:

12-7-4x-(9)=0

We add all the numbers together, and all the variables

-4x-4=0

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

-4x=4

x=4/-4

x=-1

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