6х+3=5х-4(5у+4)
3(2х-3у)-6х=8-у
6х+3=5х-20у-16
6х-9у-6х=8-у
20у= -11х-19
-8у=8
у= -(11х+19):20
у= -1
Дальше на фото
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6х+3=5х-4(5у+4)
3(2х-3у)-6х=8-у
6х+3=5х-20у-16
6х-9у-6х=8-у
20у= -11х-19
-8у=8
у= -(11х+19):20
у= -1
Дальше на фото