3(f-10)=21

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Solution for 3(f-10)=21 equation: 



3(f-10)=21

We move all terms to the left:

3(f-10)-(21)=0

We multiply parentheses

3f-30-21=0

We add all the numbers together, and all the variables

3f-51=0

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

3f=51

f=51/3

f=17

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