f(-7)=8(-7)+15

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Solution for f(-7)=8(-7)+15 equation: 



f(-7)=8(-7)+15

We move all terms to the left:

f(-7)-(8(-7)+15)=0

We add all the numbers together, and all the variables

f(-7)+41=0

We multiply parentheses

-7f+41=0

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

-7f=-41

f=-41/-7

f=5+6/7

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