<PRE><B>Question 817544</B>
s + n = 2000
n = 2000 - s
10s + 20n = 35000
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10s + 20n = 35000
10s + 20(2000 - s) = 35000
10s + 40000 - 20s = 35000
10s = 40000 - 35000
s = 5000/10
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s = 500
n = 1500
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