3(f-6)=-21

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Solution for 3(f-6)=-21 equation: 



3(f-6)=-21

We move all terms to the left:

3(f-6)-(-21)=0

We add all the numbers together, and all the variables

3(f-6)+21=0

We multiply parentheses

3f-18+21=0

We add all the numbers together, and all the variables

3f+3=0

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

3f=-3

f=-3/3

f=-1

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