Multiple choice Find the value of (x + 2y - 2z)/(x - 2y + 2z), where x = 2, y = 1, z = 1. 3 2 1 1 None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation (x + 2y - 2z)/(x - 2y + 2z) = (2 + 2 - 2)/(2 - 2 + 2) = 1 Hence, this option is incorrect.