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Mathematics, 12.12.2020 23:20 birdman6360
A man decides to give his son 1,000 LL. for every math exercise solved properly so as to encourage him to study mathematics, but takes back 500 L. L. if the solution is wrong. After 30 exercises, each has given and received the same amount. How many exercises did the son solve properly?
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A man decides to give his son 1,000 LL. for every math exercise solved properly so as to encourage h...
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