Question

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

6

48

14

8

Answer 1

@KiArUnsYu

Answer 2

@uri

Answer 3

@breja

Answer 4

@yummydum

Answer 5

\[f(x) = 2(x + 4)\]\[f(x) = 20\]so we can write these both equal to each other since they both equal \(f(x)\):\[20=2(x+4)\]distribute the \(2\):\[20=2x+8\]now just solve for x :)

Answer 6

48

Answer 7

tyvm

Answer 8

try that again...you did the opposite :)
\[20=2x+8\]subtract \(8\):\[12=2x\]divide by \(2\):\[x=6\]

Answer 9

ya because 2(20+4)= 48

Answer 10

@dmezzullo your answer is incorrect, \(x=6\)

Answer 11

ahhhh i seee now

Answer 12

oh oops idk how to do this then

Answer 13

breja if you put 48 in for x you're going to get a much larger number than 20:\[f(x)=2(48+8)\]\[f(x)=2(56)\]\[f(x)=112\]clearly that's not 20 :)

Answer 14

k lol :)