Question

If g(x) = 3(x − 2), find the value of x if g(x) = 6.
I got 12 and found out it is 4,How?

Answer 1

It says "find the value of x if g(x) = 6",which means to set g(x)=6 and solve for x. E.g.:

6=3(x - 2) now find x.

What YOU did was to let x=6, and then found g(x), e.g., g(6).

g(6) is different from "what is x when g(x)=6".

Answer 2

Remember that the notation g(x) is just function notation for the equation's y-coordinate.

It's as if you had the equation:

y=3(x - 2)

and you were asked: "If y=6, what is x?"

Answer 3

I get it now, Thank you