用绳测井深,把绳三折,井外余3米,把绳四折,还差1米不到井口,那么井深多少米?绳长多少米?

问题描述:

用绳测井深,把绳三折,井外余3米,把绳四折,还差1米不到井口,那么井深多少米?绳长多少米?

设井深为x,
8(X+4)=16(X-1)解方程的过程请写下,谢谢8X+32=16X-16
8X=48
X=6那绳长怎么求呢80算式?8*6+32=80还有问题吗没了