Which is NOT True

Question

5 + 14 = 20 - 1

9 + 5 = 7 + 7

15 = 4 + 11

15 - 9 = 9 - 4

Answer 1

Let's evaluate each equation to determine which one is NOT true:

1. 5 + 14 = 20 - 1

   • Left side: 5 + 14 = 19
   • Right side: 20 - 1 = 19
   • 19 = 19 (True)

2. 9 + 5 = 7 + 7

   • Left side: 9 + 5 = 14
   • Right side: 7 + 7 = 14
   • 14 = 14 (True)

3. 15 = 4 + 11

   • Right side: 4 + 11 = 15
   • 15 = 15 (True)

4. 15 - 9 = 9 - 4

   • Left side: 15 - 9 = 6
   • Right side: 9 - 4 = 5
   • 6 ≠ 5 (False)

The equation that is NOT true is 15 - 9 = 9 - 4.