[x-(3500*7)]*5%=357.44(x-24500)*0.05=357.44x-24500=357.44/0.05x-24500=7148.8x=7148.8+24500x=31648.8[x-(3500*7)]*10%-750=886
(x-24500)*0.1-750=886
x-24500=886/0.1+750
x-24500=9610
x=9610+24500
x=34110假如当月应缴357.44(未超过750)
假如当月应缴886(超过750)