f(-7)=-7+6

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Solution for f(-7)=-7+6 equation: 



f(-7)=-7+6

We move all terms to the left:

f(-7)-(-7+6)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

f(-7)+1=0

We multiply parentheses

-7f+1=0

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

-7f=-1

f=-1/-7

f=1/7

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