10f-30=7f-9

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Solution for 10f-30=7f-9 equation: 



10f-30=7f-9

We move all terms to the left:

10f-30-(7f-9)=0

We get rid of parentheses

10f-7f+9-30=0

We add all the numbers together, and all the variables

3f-21=0

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

3f=21

f=21/3

f=7

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