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777EKX777
@777EKX777
August 2022
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Представьте число 219 в виде суммы трёх слагаемых x, y и z так, что-бы x:y=4:9, а y:z=15:2 2/3
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Thews
Составляем систему уравнений:
x+y+z=219 | x=219-y-z | x=219-y-z | x=219-y-z | x=219-y-z
x÷y=4÷9 | 9x=4y | 1971-9y-9z=4y | 13y=1971-9z | 13y=1971-9z
y÷z=15÷2 2/3 | 15z=8y/3 | 45z=8y | 45z=8y | z=8y/45
x=219-y-z | x=219-y-z | x=219-y-z x=60
13y=1971-9*8y/45 | 13y+8y/5=1971 | 73y=9855 y=135
z=8y/45 | z=8y/45 | z=8y/45 z=24
7 votes
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Thews
все съехало
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Answers & Comments
x+y+z=219 | x=219-y-z | x=219-y-z | x=219-y-z | x=219-y-z
x÷y=4÷9 | 9x=4y | 1971-9y-9z=4y | 13y=1971-9z | 13y=1971-9z
y÷z=15÷2 2/3 | 15z=8y/3 | 45z=8y | 45z=8y | z=8y/45
x=219-y-z | x=219-y-z | x=219-y-z x=60
13y=1971-9*8y/45 | 13y+8y/5=1971 | 73y=9855 y=135
z=8y/45 | z=8y/45 | z=8y/45 z=24