f*1=7*1+2

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Solution for f*1=7*1+2 equation: 



f*1=7*1+2

We move all terms to the left:

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

We add all the numbers together, and all the variables

f*1-9=0

Wy multiply elements

f-9=0

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

f=9

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