f(-2)=7(-2)-1

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Solution for f(-2)=7(-2)-1 equation: 



f(-2)=7(-2)-1

We move all terms to the left:

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

We add all the numbers together, and all the variables

f(-2)+15=0

We multiply parentheses

-2f+15=0

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

-2f=-15

f=-15/-2

f=7+1/2

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