If ‘+’ means ‘÷’, ‘÷’ means ‘−’, ‘−’ means ‘×’ and ‘×’ means ‘+’, then 9 + 3 ÷ 5 − 3 × 7 =

Explanation

Replace the symbols according to the rule: + means ÷, ÷ means −, − means ×, and × means +. Thus 9 + 3 ÷ 5 − 3 × 7 becomes 9 ÷ 3 − 5 × 3 + 7. Applying normal precedence gives 3 − 15 + 7 = −5.