Which two signs and numbers need to be intnerchanged to make the following equation correct?
(31 × 3) - (27 × 4) + (81 ÷ 9) = 126
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 27 and 9, + and -.
Given equation: (31 × 3) - (27 × 4) + (81 ÷ 9) = 126
Option (4): 27 and 9, + and -
After interchanging the signs and digits we get,
⇒ (31 × 3) + (9 × 4) - (81 ÷ 27) = 126
⇒ 93 + 36 - 3 = 126
⇒ 129 - 3 = 126
⇒ 126 = 126