12.9-x=-19

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Solution for 12.9-x=-19 equation: 



12.9-x=-19

We move all terms to the left:

12.9-x-(-19)=0

We add all the numbers together, and all the variables

-1x+31.9=0

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

-x=-31.9

x=-31.9/-1

x=31+0.9/1

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