2f-1=80+f-3f-5f

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Solution for 2f-1=80+f-3f-5f equation: 



2f-1=80+f-3f-5f

We move all terms to the left:

2f-1-(80+f-3f-5f)=0

We add all the numbers together, and all the variables

2f-(-7f+80)-1=0

We get rid of parentheses

2f+7f-80-1=0

We add all the numbers together, and all the variables

9f-81=0

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

9f=81

f=81/9

f=9

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