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A function is shown below.

f (x) = 83 - 11

What value of x makes f (20) = 21?

Enter your answer in the grid below.

please help!

A function is shown below f x 83 11 What value of x makes f 20 21 Enter your answer in the grid below please

Answer :

Answer:

the answer is 4

Step-by-step explanation:

if y=21 the we substitute in the main equation

21=8x-11

8x=32

x=4

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