80X+100X=2940 怎么解
问题描述:
80X+100X=2940 怎么解
答
80X+100X=2940
180x=2940
x=2940/180=49/3
80X+100X=2940 怎么解
80X+100X=2940
180x=2940
x=2940/180=49/3