51×(х-9)=0 (х-12)×73=0

Question

51×(х-9)=0 (х-12)×73=0

Answer 1

51х-459=0
х=459:51
х=проверка
459-459=0
0=0
(х-12)×73=0
73х-876=0
х=876:73
х=12
проверка(12-12)×73=0
0=0