If the numbers 15 and 21 are interchanged, then which of the following equations will be correctly balanced?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 63 ÷ 15 + 21 × 5 – 4 = 74.
Given condition: 15 and 21 are interchanged
Option 4: 63 ÷ 15 + 21 × 5 – 4 = 74
The expression becomes:
63 ÷ 21 + 15 × 5 – 4 = 74
74 = 74