4
Answer: CSet 1: Linear Functions (Advanced)
Explanation
PROBLEM
If f(x) = 3x - 6, find x when f(x) = x + 4.
If f(x) = 3x - 6, find x when f(x) = x + 4.
A.
2
B.
10
C.✓ Correct
5
D.
3
Detailed Explanation
Choice C is the best answer. 3x - 6 = x + 4. 2x = 10, x = 5
Why others are wrong:
A: 2 is incorrect because it does not satisfy the equation.
B: 10 is incorrect because it does not satisfy the equation.
D: 3 is incorrect because it does not satisfy the equation.