Question

12-(х+4целых 7/15) = 5 целых 13/15

Answer 1

X + 4 715 = 12 - 5 1315 
X + 4 715 = 11 1515 - 5 1315 = 6 215
X = 6 215 - 4 715 = 5 1715 - 4 715 = 1 1015 = 1 23