If ? represents addition, ? represents subtraction, and ? represents multiplication, what is the res

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Problem-Solving By Substitution

Interchange Of Signs And Numbers

A. 38

B. 40

C. 42

D. 44

E. None of the above

Answer: B. 40

Using BODMAS, first perform multiplication: 2 ? 4 = 8. Then substitute: 9 ? 3 = 12, and finally 12 ? 8 = 40.

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