12-0.4x=-39.6

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Solution for 12-0.4x=-39.6 equation: 



12-0.4x=-39.6

We move all terms to the left:

12-0.4x-(-39.6)=0

We add all the numbers together, and all the variables

-0.4x+51.6=0

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

-0.4x=-51.6

x=-51.6/-0.4

x=+129

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