Which two numbers should be interchanged to make the following equation correct?
9 + 7 - (6 ÷ 3 - 4) × 8 = 31
1
8 and 7
2
9 and 7
3
6 and 7
4
4 and 7
Which two numbers should be interchanged to make the following equation correct?
9 + 7 - (6 ÷ 3 - 4) × 8 = 31