80%乘以X+(500-X)乘以60%=500X74%怎么做500X74%那个X是乘号
问题描述:
80%乘以X+(500-X)乘以60%=500X74%怎么做
500X74%那个X是乘号
答
80%乘以X+(500-X)乘以60%=500X74%怎么做
500X74%那个X是乘号