7f-8=9f+20+10

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Solution for 7f-8=9f+20+10 equation: 



7f-8=9f+20+10

We move all terms to the left:

7f-8-(9f+20+10)=0

We add all the numbers together, and all the variables

7f-(9f+30)-8=0

We get rid of parentheses

7f-9f-30-8=0

We add all the numbers together, and all the variables

-2f-38=0

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

-2f=38

f=38/-2

f=-19

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