If ‘-‘ means ‘division’, ‘+’ means ‘multiplication’, ‘×’ means ‘addition’ and ‘÷’ means ‘subtraction’, which of the following equations is correct?
1
10 - 2 + 3 ÷ 9 × 2 = 8
2
10 + 3 - 2 × 9 ÷ 2 = 21
3
20 + 6 - 4 × 9 ÷ 6 = 32
4
20 ÷ 9 × 9 - 4 + 6 = 33