Mathematics · Averages
In a class, there are (x + 10) students with an average weight of 40 kg. If y more students, each with an average weight of 48 kg, are added, the average weight of the class increases by 2 kg. If (y + 5) students, each with an average weight of 44 kg, are added instead, the average weight of the class increases by 1.6 kg. Find the value of 2(x + y).
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