7f-3=-66

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Solution for 7f-3=-66 equation: 



7f-3=-66

We move all terms to the left:

7f-3-(-66)=0

We add all the numbers together, and all the variables

7f+63=0

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

7f=-63

f=-63/7

f=-9

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