Question 31
If '+' means '÷', '-' means 'x', 'x' means '-' and '÷' means '+', then (5 - 8 x 6 ÷ 11) + 9 = ?
Solution
'+' means '÷', '-' means 'x', 'x' means '-' and '÷' means '+', then (5 - 8 x 6 ÷ 11) + 9 = ?
$$(5 - 8\times 6\div 11) + 9$$
$$(5\times 8- 6 + 11)\div 9$$
appl bodmass rule
$$(40- 6 + 11)\div 9$$
$$45\div 9 = 5$$
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