If – stands for division, + for multiplication, ÷ for subtraction, × for addition, then which of the following equations is correct?
20 – 4 + 6 ÷ 9 × 4 = 25
20 × 4 – 6 – 4 + 9 = 20
20 ÷ 9 × 9 – 4 + 6 = 33
20 + 6 – 4 × 9 ÷ 6 = 32
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