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Polina2028
@Polina2028
October 2021
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Реши систему уравнений методом подстановки:
{x−2y=−3
{7x−9y=7
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армения20171
армения20171
Х=2у-3
7(2у-3)-9у=7
14у-21-9у=7
5у=28
у=28/5
х=2у-3=56/5-3=(56-15)/5=41/5
ответ( 41/5;28/5)
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