If ‘x’ means ‘-’, ‘-’ means ‘x’, ‘+’ means ‘÷’ and ‘÷ ‘ means ‘+’, then what will be the value for 15 – 2 ÷ 900 + 90 x 100?

With × → −, − → ×, + → ÷ and ÷ → +, the expression 15 − 2 ÷ 900 + 90 × 100 becomes 15 × 2 + 900 ÷ 90 − 100. Multiplication and division first: 30 and 10. Then 30 + 10 − 100 = −60.