Question

If g(x)= 2(x-4), find the value of x if g(x)= 20.

A. 32
B. 12
C. 14
D. 10

Answer 1

just plug them in. you would do like 2(32-4) which is 56 so no.

Answer 2

So C. 14?

Answer 3

Is it 14?

Answer 4

Two ways to do this

Method 1: Plug in each answer choice as @WhoaItsJian suggests

Method 2: replace g(x) with 20 and solve for x



I prefer method 2


g(x)= 2(x-4)
20 = 2(x-4)
20/2 = 2(x-4)/2
10 = x-4
x-4 = 10
x-4+4 = 10+4
x = 14


So x = 14 is a possible answer. We can check by using Method 1


20 = 2(x-4)
20 = 2(14-4)
20 = 2(10)
20 = 20 ... true, so solution is confirmed

you are correct @Rebecca_sonnenschein

Answer 5

Thank you guys(:

Answer 6

c=14