Question 508780
a = advanced class size
b = beginner class size
i = intermediate class size
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Total students is 43.
a + i + b = 43
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Beginning class is twice the size of the advanced class.
b = 2a
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Intermediate class has 3 more students than the advanced class.
i = a+3
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substitute
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a +a+3 +2a = 43
4a = 40
a = 10
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b = 2a = 20
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i = a+3 = 13
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check
10+20+13=43
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Answer: There are 10 students in the advanced class.
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Done.