A school has two types of rooms: rooms for smaller classes with 2 windows and rooms for bigger classes with 3 windows. There are 58 windows in the school, and 25 rooms. How many rooms are for smaller classes?
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Let Number of smaller classes be = x
No. of bigger classes = y
Total number of classes = x+y = 25
Number of windows for smaller classes =2
Number of windows for bigger classes = 3
2x+3y = 58--(1)
x+y = 25 -----(2)
Multiply (2) by 2 2x+2y = 50---------(3)
Substract (1) - (3)
y =8 and substitute the value of y in (2)
x = 17
Number of smaller classes = x= 17
Step-by-step explanation:
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