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Sanek14102001
@Sanek14102001
July 2022
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решите систему уравнений:
Х-3у=-1
2х+у=5
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belozerova1955
Verified answer
Х= -1+3у
подставим во второе
2(-1+3у)+у=5
-2+6у+у=5
7у=7
у=7:7
у=1
найдем х:
х=-1+3=2
Ответ: х=2; у=1
0 votes
Thanks 1
Книгоlove
Verified answer
Х=3у-1
2(3у-1)+у=5
6у-2+у=5
7у=7
у=1
х=3*1-1
х=2
0 votes
Thanks 0
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Answers & Comments
Verified answer
Х= -1+3уподставим во второе
2(-1+3у)+у=5
-2+6у+у=5
7у=7
у=7:7
у=1
найдем х:
х=-1+3=2
Ответ: х=2; у=1
Verified answer
Х=3у-12(3у-1)+у=5
6у-2+у=5
7у=7
у=1
х=3*1-1
х=2