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Yaroslav543
@Yaroslav543
July 2022
1
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Решите систему уравнений,
1)х+2у=11
5х-3у=3
И
2)3х-2у=11
4х-5у=3
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ЧипчилинкаИзСада
Verified answer
1.
х=11-2у
5 (11-2у)-3у=3
х=11-2у
55-10у-3у=3
х=11-2у
55-13у=3
х=11-2у
13у=55-3
х=11-2у
у=52÷13
х=11-2×4
у=4
х=3
у=4
2.
2у=3х-11
4х-5у=3
у=1. 5х-5.5
4х-5 (1. 5х-5.5)=3
у=1.5х-5.5
4х-7.5х+27. 5=3
у=1.5х-5.5
-3.5х=3-27.5
у=1.5х-5.5
-3.5х=-24.5
у=1.5×7-5.5
х=7
у=5
х=7
2 votes
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Answers & Comments
Verified answer
1.х=11-2у
5 (11-2у)-3у=3
х=11-2у
55-10у-3у=3
х=11-2у
55-13у=3
х=11-2у
13у=55-3
х=11-2у
у=52÷13
х=11-2×4
у=4
х=3
у=4
2.
2у=3х-11
4х-5у=3
у=1. 5х-5.5
4х-5 (1. 5х-5.5)=3
у=1.5х-5.5
4х-7.5х+27. 5=3
у=1.5х-5.5
-3.5х=3-27.5
у=1.5х-5.5
-3.5х=-24.5
у=1.5×7-5.5
х=7
у=5
х=7