Hotel rooms

In the 45 rooms, there were 169 guests. Some rooms were three-bedrooms and some five-bedrooms. How many rooms were there?

Final Answer:

a =  28
b =  17

Step-by-step explanation:

a+b=45 3a+5b=169  3 a+5 b=169  3a+5b=169  Pivot:Row1Row2  Row231 Row1Row2 0.67b=11.33  b=0.6666666711.33333333=17 a=31695b=31695 17=28  a=28 b=17



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