If the numbers ‘18’ and ‘30’ are interchanged, then which of the following equations can be correctly balanced?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 35 ÷ 5 × 5 + 30 – 18 = 23.
Given conditions: 18 and 30 are interchanged
Option 1: 35 ÷ 5 × 5 + 30 – 18 = 23
After replacing the expression becomes:
= 35 ÷ 5 × 5 + 18 – 30
= 7 × 5 + 18 – 30
= 35 + 18 – 30 = 23