2
Answer: BSet 2: Linear Functions (Intermediate)
Explanation
PROBLEM
If f(x) = 6x - 12, find x when f(x) = 18.
If f(x) = 6x - 12, find x when f(x) = 18.
A.
6
B.✓ Correct
5
C.
4
D.
3
Detailed Explanation
Choice B is the best answer. 6x - 12 = 18. 6x = 30, x = 5
Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
C: 4 is incorrect because it does not satisfy the equation.
D: 3 is incorrect because it does not satisfy the equation.