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arsenkina2004
@arsenkina2004
August 2022
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решите уравнение способом подстановки х+3у=7 х+2у=5
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lemarakurtazhiv
Х/2 - у/3=1
х/5 - у/4= -1
3х -2у=6
4х-5у= -20
3х-2у=6
5у=4х+20
3х-2у=6
у=0,8х+4
3х-2(0,8х+4)=6
у=0,8х+4
3х-1,6х - 8=6
у=0,8х+4
1,4х=14
у=0,8х+4
х=10
у=0,8*10+4
х=10
у=12
(10; 12)
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Answers & Comments
х/5 - у/4= -1
3х -2у=6
4х-5у= -20
3х-2у=6
5у=4х+20
3х-2у=6
у=0,8х+4
3х-2(0,8х+4)=6
у=0,8х+4
3х-1,6х - 8=6
у=0,8х+4
1,4х=14
у=0,8х+4
х=10
у=0,8*10+4
х=10
у=12
(10; 12)