Предмет: Математика, автор: lic4nizova

в первой пачке было в 3 раза больше тетрадей,чем во второй. Когда во вторую пачку добавили 13 тетрадей, а из первой взяли 10 тетрадей, то в двух пачках стало 87 тетрадей. Сколько тетрадей было в каждой пачке первоначально7

Ответы

Автор ответа: Kasandra87

0

1)3х-10+х+13=87
4х+3=87
4х=84
х=21(2 пачка)
2)21*3=63(1 пачка)

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