Answer:
Explanation:
Remark
What the question means is wherever you see an x on the right, you put in 12 and solve it. I'm going to assume you mean (2/3)*x + 3 on the right.
Solution
f(12) = (2/3) * 12 + 3
f(12) = 2 * 12 / 3 + 3
f(12) = 24/3 + 3
f(12) = 8 + 3
f(12) = 11