9f+8=89

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Solution for 9f+8=89 equation: 



9f+8=89

We move all terms to the left:

9f+8-(89)=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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