n - 4 = 16 Given
+ 4 + 4 Cancel out 4 to isolate n variable
n = 20
Prove.
20 - 4 = 16
16 = 16
True.
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Answer:

Given:
f(x) = - 3x - 5
g(x) = 4x - 2
To Find:
(f + g)(x)
Step-by-step explanation:

Well 15 is over 8 so figure out how many times 8 goes into 15 then the rest of 15 replaces it over the 8