Предмет: Другие предметы, автор: халед

помогите пж: За все свои деньги Маша может купить три карандаша или один мяч. Сколько стоит карандаш? Сколько стоит мяч, если один карандаш и один мяч стоят 20 руб.? Сколько денег было у Маши? Реши задачу с помощью схемы.)

Ответы

Автор ответа: Darkroni
15

карандаш-х

мяч-3х

3х+х=20

4х=20

х=20/4=5

=>

3 карандаша=5*3=15

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