Предмет: Алгебра, автор: stepkafeed

Решить задачю системой уравнения: Для одной лошади и двух коров выдают ежеднев. 34 кг сена, а для двух лошадей и одной коровы - 35кг сена. Сколько сена выдают ежедневно для одной лошади и сколько для одной коровы?

Ответы

Автор ответа: RINAT101

лошадь - x

корова - y

1) x + 2y= 34

2) 2x + y =35 (1 и 2 это уравнения в системе )

из 1-го х = 34- 2у

подставим во второе и получим

2*(34-2у) +у = 35

68-4у+у =35

-3у =35-68

-3у = -33

у= 11 кг сена съедает корова

х = 34-2*11= 34-22= 12кг сена съедает лошадь

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