2x=2.686
x=1.343
y=1.689-1.343=0.346
Проверка:
1,343+0,346=1,689
1,343-0,346=0,997
Ответ:х=1,343 у=0,346
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2x=2.686
x=1.343
y=1.689-1.343=0.346
Проверка:
1,343+0,346=1,689
1,343-0,346=0,997
Ответ:х=1,343 у=0,346