4 6а-4б-(-3 8б 3 5а) July 8, 2019 16 32 64 128 4 6а-4б-(-3 8б+3 5а) 4 6а-4b-(-3 8b+3 5a) 4 + 4 = 6 4 6a-4b-(-3 8b+3 5a)