30+.8f=f

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Solution for 30+.8f=f equation: 



30+.8f=f

We move all terms to the left:

30+.8f-(f)=0

We add all the numbers together, and all the variables

-0.2f+30=0

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

-0.2f=-30

f=-30/-0.2

f=+150

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