7f-8=10+9f

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Solution for 7f-8=10+9f equation: 



7f-8=10+9f

We move all terms to the left:

7f-8-(10+9f)=0

We add all the numbers together, and all the variables

7f-(9f+10)-8=0

We get rid of parentheses

7f-9f-10-8=0

We add all the numbers together, and all the variables

-2f-18=0

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

-2f=18

f=18/-2

f=-9

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