If '?' denotes subtraction, '?' denotes addition, '?' denotes multiplication, and '?' denotes divisi

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Problem-Solving By Substitution

Interchange Of Signs And Numbers

A. 20

B. 25

C. 22

D. 30

E. None of the above

Answer: C. 22

Following BODMAS: 10 + 5 * 2 - 3 / 1 = 10 + 10 - 3 = 17.

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