 
<translate> Ajụjụ. Billy dị kilogram 9 karịa Brad. Brad dị kilogram ise karịa Carl. Ọ bụrụ na Carl dị kilogram 145, ego ole ka Billy dị, n'arọ? Zaa ya. 159 ihe Olee ihe e kwuru nke na-egosi na azịza ya bụ eziokwu? <eng> Question. Billy weighs 9 pounds more than Brad. Brad weighs 5 pounds more than Carl. If Carl weighs 145 pounds, how much does Billy weigh, in pounds?
Answer. 159
What step-by-step reasoning justifies that answer? 