December 2021 0 3 Report
Помогите плиииз решить задачу: три ручки и два карандаша стоят 170 рублей,а три ручки и три карандаша стоят 180 рублей.сколько стоит одна ручка и сколько один карандаш? решите уровнением 
зарание спосибо)
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