SOLUTION: The admission fee at a small fair is $2 for children and $4 for adults. On a certain day, 750 people entered the fair and $2,500 was collected. How many children attended the small

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Question 734627: The admission fee at a small fair is $2 for children and $4 for adults. On a certain day, 750 people entered the fair and $2,500 was collected. How many children attended the small fair on that day?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
c+a=750
2c+4a=2500
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a=750-c
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2c+4(750-c)=2500
2c+3000-4c=2500
-2c=2500-3000
c=-500/-2
c=250 children
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2*250+4a=2500
500+4a=2500
4a=2500-500
a=2000/4
a=500 adults