f(-7)=5(-7)+4

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Solution for f(-7)=5(-7)+4 equation: 



f(-7)=5(-7)+4

We move all terms to the left:

f(-7)-(5(-7)+4)=0

We add all the numbers together, and all the variables

f(-7)+31=0

We multiply parentheses

-7f+31=0

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

-7f=-31

f=-31/-7

f=4+3/7

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