Seudónimo Seudónimo

05-07-2017
Mathematics

contestada

Given the function f(x) = 2(x + 4), find x if f(x) = 20.

6

48

14

8

Respuesta :

05-07-2017

So since we are solving for x, put 20 instead of f(x):

20 = 2(x + 4)

You can distribute 2 to x and 4:

20 = 2x + 8

Subtract both sides by 8:

12 = 2x

Divide both sides by 2

6 = x

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