найдите сумму вектаров: DF+2AF–0.5FD+3FA–1.5DF+AK
DF+2AF-0,5FD+3FA-1,5DF+AK=DF+2AF+0,5DF-3AF-1,5DF+AK= =DF+(0,5DF-1,5DF)+(2AF-3AF)+AK=DF-DF-AF+AK=AK-AF=FK