7f+3=3f+15

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Solution for 7f+3=3f+15 equation: 



7f+3=3f+15

We move all terms to the left:

7f+3-(3f+15)=0

We get rid of parentheses

7f-3f-15+3=0

We add all the numbers together, and all the variables

4f-12=0

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

4f=12

f=12/4

f=3

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