August 2021 0 8 Report
Решите уравнения методом подстановки. а)5х-у=7 и 7х-3у=13
б)4х=6у-10 и 6х-у=1
в)3х=5+у и 5х+2у=23
г)2х-3у=8 и 7х-5у=-5
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