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kosmos32
@kosmos32
October 2021
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решите 6 задачу срочно
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avilika
Пусть скорость пешком х км/час, скорость на поезде у км/час.1,5х + 4у = 206 (1)2х + 3у = 158 (2)Умножим 1-е на 3, 2-е на 4:4,5х + 12у = 618 (1)8х + 12у = 632 (2)и вычтем (1) из (2)3,5х = 14
х = 4 (км/час) - скорость сельчанина.
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