2f+8+5f-2=90

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Solution for 2f+8+5f-2=90 equation: 



2f+8+5f-2=90

We move all terms to the left:

2f+8+5f-2-(90)=0

We add all the numbers together, and all the variables

7f-84=0

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

7f=84

f=84/7

f=12

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