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pirali2014
@pirali2014
July 2022
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Решите систему уравнений.
3х-2у=12,
х+2у=-4;
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iriska124
Суммируя два уравнения
13 votes
Thanks 20
Матов
Verified answer
3х-2у=12
х+2у=-4
складываем
4х=8
х=8\4
х=2
тогда
х+2у=-4
2+2у=-4
2у=-4-2
2у=-6
у=-6\2
у=-3
проверка
3*2-2*(-3)=12
6+6=12
12=12
ответ ---- (2,-3)
10 votes
Thanks 8
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Answers & Comments
Verified answer
3х-2у=12х+2у=-4
складываем
4х=8
х=8\4
х=2
тогда
х+2у=-4
2+2у=-4
2у=-4-2
2у=-6
у=-6\2
у=-3
проверка
3*2-2*(-3)=12
6+6=12
12=12
ответ ---- (2,-3)