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Вопрос по алгебре:
Решите систему уравнений 3x+4y=29 4x+7y=52-
Автор:
belle66
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Ответ:
Объяснение:
3x+4y=29 *4
4x+7y=52 *-3
12x+16y=116
-12x-21y=-156
-5y= -40
y= -40:(-5)
y=8
3x+4*8=29
3x=29-32
3x= -3
x= -1
(-1;8)
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