修一条公路,计划每天修60米,实际每天多修15米,结果提前4天修完,一共修了多少米?
问题描述:
修一条公路,计划每天修60米,实际每天多修15米,结果提前4天修完,一共修了多少米?
答
设一共修了x米,由题意得:x60-x60+15=4, x60-x75=4, 5x300-4x300=4, 5x-4x=1200, &n...
修一条公路,计划每天修60米,实际每天多修15米,结果提前4天修完,一共修了多少米?
设一共修了x米,由题意得:x60-x60+15=4, x60-x75=4, 5x300-4x300=4, 5x-4x=1200, &n...