In a code, '?' means addition, '?' means subtraction, '×' means multiplication, and '÷' means divi

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Problem-Solving By Substitution

Interchange Of Signs And Numbers

A. 20

B. 22

C. 18

D. 16

E. None of the above

Answer: B. 22

9 + 3 × 2 - 4 ÷ 2 = 9 + 6 - 2 = 13. Correct calculation gives 22.

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