Occupied 82715

Fifty pupils were in the camp; they lived in double and triple rooms. They occupied 20 rooms, many of which were two- and three-story. Please proceed.

Correct answer:

a =  10
b =  10

Step-by-step explanation:

a+b=20 2a+3b=50  a+b=20 2 a+3 b=50  a+b=20 2a+3b=50  Pivot:Row1Row2 2a+3b=50 a+b=20  Row221 Row1Row2 2a+3b=50 0.5b=5  b=0.55=10 a=2503b=2503 10=10  a=10 b=10



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