Multiple choice What should be the value of 'a' if 2y - 3y - a = 3 for y = 1 -1 1 4 -4 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Substitute y = 1 into the equation: 2(1) - 3(1) - a = 3. This simplifies to 2 - 3 - a = 3, which is -1 - a = 3. Solving for a gives -a = 4, so a = -4.