The rooms in the mountain hotel are double and triple. Double rooms are 25, and triple is 17 more. How many rooms are there in this hotel?

Correct answer:

s =  67

Step-by-step explanation:

a=25 b=a+17=25+17=42 l=2 a+3 b=2 25+3 42=176 s=a+b=25+42=67

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