-6f+2+4=21

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Solution for -6f+2+4=21 equation: 



-6f+2+4=21

We move all terms to the left:

-6f+2+4-(21)=0

We add all the numbers together, and all the variables

-6f-15=0

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

-6f=15

f=15/-6

f=-2+1/2

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