f(-4)=3+17

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Solution for f(-4)=3+17 equation:



f(-4)=3+17
We move all terms to the left:
f(-4)-(3+17)=0
We add all the numbers together, and all the variables
f(-4)-20=0
We multiply parentheses
-4f-20=0
We move all terms containing f to the left, all other terms to the right
-4f=20
f=20/-4
f=-5

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