Объяснение:
{Х-3у=8 х=8+3у
{12х-у=6
12(8+3у)-у=6
96+36у-у=6
35у=6-96
35у= - 90
У= - 90/35= - 18/7
Х=8+3×(-18/7)=8-54/7=2/7
Ответ : ( 2/7; - 18/7)
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Объяснение:
{Х-3у=8 х=8+3у
{12х-у=6
12(8+3у)-у=6
96+36у-у=6
35у=6-96
35у= - 90
У= - 90/35= - 18/7
Х=8+3×(-18/7)=8-54/7=2/7
Ответ : ( 2/7; - 18/7)