a) 8x - 6y + 7x - 2y = (8x + 7x) + (-6y - 2y) = (8 + 7)x + (-6 - 2)y = 15x - 8y
Ответ: 15x - 8y
б) 27p + 14q - 16p - 3q = (27p - 16p) + (14q - 3q) = (27 - 16)p + (14 - 3)q = 11p + 11q
Ответ: 11p + 11q