+ 
= 9 and 
= 5, then what is the value of + + + ?
A) 13
B) 12
C) 17
D) 4
Correct Answer: C
Solution :
+ 
= 9 and = 5. So, 
= 4. Therefore, 
+ + + = 5 + 4 + 4 + 4 = 17.
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