Mathematics, 10.05.2021 05:00 Mantisa

Some were fast, and the rest were slow. Ten times the number of fast was 140 less than twice the number of slow. Also, one-half the number of slow exceeded 3 times the number of fast by 10. How many were fast and how many were slow?

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Some were fast, and the rest were slow. Ten times the number of fast was 140 less than twice the num...