<PRE><B>Question 357158</B>
At Johnson Middle school, 170 students buy 3 ring binders from school store. This number has been increasing at a rate of about 25 per year. 
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#(3 ring) = 170+25x
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The number of students buying 2 ring binders is 300 and has been decreasing at a rate of about 15 per year.
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#(2 ring) = 300-15x
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 At these rates, when will the number of 2 ring binders sold be half the number of 3 ring binders sold?
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Equation:
Solve: 300-15x = (1/2)(170+25x)
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600 - 30x = 170+25x
55x = 430
x = 7.82 years
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Cheers,
Stan H.
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