18-18f-9f=-15f-6

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Solution for 18-18f-9f=-15f-6 equation: 



18-18f-9f=-15f-6

We move all terms to the left:

18-18f-9f-(-15f-6)=0

We add all the numbers together, and all the variables

-27f-(-15f-6)+18=0

We get rid of parentheses

-27f+15f+6+18=0

We add all the numbers together, and all the variables

-12f+24=0

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

-12f=-24

f=-24/-12

f=+2

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