а) (27p + 74q ) - (31q + 27p ) = 27p + 74q − (31q + 27p) = 27p + 74q − 31q − 27p = 43q
б) 47 - 53x - 42x - 67y - 89y=-95x-156y+47
а) (27p + 74q ) - (31q + 27p ) = 27p + 74q − (31q + 27p) = 27p + 74q − 31q − 27p = 43q
б) 47 - 53x - 42x - 67y - 89y=-95x-156y+47