Question

After interchanging "×" and "÷", "7" and "4", which of the following equations becomes correct?

A 21 × 4 + 7 ÷ 5 = 24
B 35 × 4 + 7 ÷ 2 = 20
C 7 ÷ 4 + 15 × 5 = 35
D 140 × 4 + 20 ÷ 7 = 100
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