MiguelEmirPadillaCan MiguelEmirPadillaCan

05-11-2020
Mathematics

contestada

If f(x) = 4x + 5, what is the value of x when f(x) = 21?

Respuesta :

themetroprince themetroprince

05-11-2020

Answer:

x=4

Step-by-step explanation:

f(x)=4x+5

f(x)=21

use substitution

21=4x+5

subtract 5 from both sides

4x=16

divide both sides by 4

x=4

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