21*( )-( )*17=48 ( )*18+12*( )=120
问题描述:
21*( )-( )*17=48 ( )*18+12*( )=120
答
21*(12)-(12)*17=48,(4)*18+12*(4)=120
21*( )-( )*17=48 ( )*18+12*( )=120
21*(12)-(12)*17=48,(4)*18+12*(4)=120