Упростите выражение и найдите его значение:
а)5х+8х при х=13,
б)12у-6у=6,
в)9а+7а при а=16,
г)18b-7b при b=11 
помогите

answer the guestions 1. Where do you usually spend your summer holidays? 2 What do you like to do in the country? 3 What do you like to do at the seaside? 4 What do you like to do in the city? 5 What do you like to do to at camp? 6 Do you like your summer holidays? Why?