Final answer:
To find the value of x where g(x) = 3 for the equation y = 9 + 3x, you equate 3 to the equation, solve for x, and find that x = -2.
Step-by-step explanation:
To find the value(s) of x for which g(x) = 3, you should look at the given equation y = 9 + 3x. Since g(x) refers to the function which outputs y, we can equate g(x) or y to 3 and solve for x.
The equation becomes 3 = 9 + 3x. To solve for x, you first subtract 9 from both sides, which gives you -6 = 3x. Then, divide both sides by 3 to isolate x, resulting in x = -2.
Therefore, the value of x for which g(x) equals 3 is x = -2.