Multiple choice

What must be added to 3x + y to get 2x + 3y

  1. 5x + 4y

  2. -x + 2y

  3. X -2y

  4. X + 2y

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let the required expression be X. Then 3x + y + X = 2x + 3y, so X = 2x + 3y - 3x - y = -x + 2y. This gives us what must be added to transform the first expression into the second.