Which of the following interchange in two mathematical operators will balance the equation given below?
63 - 23 × 132 ÷ 12 + 7 = 117
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. + and ×.
Given equation: 63 - 23 × 132 ÷ 12 + 7 = 117
After interchanging the signs;
63 - 23 + (132 ÷ 12) × 7 = 117
⇒ 63 - 23 + (11 × 7) = 117
⇒ 63 - 23 + 77 = 117
⇒ 140 - 23 = 117