Correct Answer: 53
Explanation:
Using the correct symbols, we have 18 Q 1 2 P 4 R 5 S 6 = 18 x 12 ÷ 4 + 5 - 6 = 18 x 3 + 5 - 6 = 54 + 5 - 6 = 59 - 6 = 53
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