Given the function f(x) = 2(x + 8), find x if f(x) = 12

Question

anonymous · Answer

You are given with f(x) = 12

So just plug in the value of f(x)

$$2( x + 8) = 12$$

Now divide by 2 both the sides and tell me what did you get...

anonymous · Answer

i got  40

anonymous · Answer

wait... :P never mind i did it wrong

anonymous · Answer

no..

It is not the values of x it is value of f(x)  be careful..

anonymous · Answer

See the difference:

f(x) = 12            Here the value of function itself is 12

f(12)             Here the value of x is 12..

anonymous · Answer

Are you solving it or not @vetdoc

anonymous · Answer

would i subtract the12 by 8?

anonymous · Answer

Firstly divide by 2 both the sides..

anonymous · Answer

Show your steps how are you doing it and then I can tell what step is to make...

anonymous · Answer

2(x+8)=12
--         --
2            2
x+8=6
   -8 -8
x=-2

anonymous · Answer

Yes you are absolutely right..

Cheers...!