b30 c30-30ab-30bc 30ca3130/13 7x 30y
问题描述:
b30 c30-30ab-30bc 30ca3130/13 7x 30y
答
12/1221y=12/12211___2、y=x4 21x-60=x 60
b30 c30-30ab-30bc 30ca3130/13 7x 30y
12/1221y=12/12211___2、y=x4 21x-60=x 60