Ответ:
x=4
y=3
Пошаговое объяснение:
x+y=7 ==> x=7-y
x-3y=-5 И x=7-y ==> 7-y-3y=-5 ==> 7-4y=-5 ==> -4y=-12 ==> y=3
x=7-y И y=3 ==> x=7-3 ==> x=4
Отв.:y=3;x=4
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Ответ:
x=4
y=3
Пошаговое объяснение:
x+y=7 ==> x=7-y
x-3y=-5 И x=7-y ==> 7-y-3y=-5 ==> 7-4y=-5 ==> -4y=-12 ==> y=3
x=7-y И y=3 ==> x=7-3 ==> x=4
Отв.:y=3;x=4