Решение:
2/5(p+3q) + 1/4(p-q) = 2/5p + 6/5q + 1/4p - 1/4q = 8/20p + 5/20p + 24/20q - 5/20q = 13/20p + 19/20q
Ответ: 13/20p + 19/20q