3f+2=7f-18

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Solution for 3f+2=7f-18 equation: 



3f+2=7f-18

We move all terms to the left:

3f+2-(7f-18)=0

We get rid of parentheses

3f-7f+18+2=0

We add all the numbers together, and all the variables

-4f+20=0

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

-4f=-20

f=-20/-4

f=+5

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