用一根绳子测量井深,直接量,井外余5米.对折量,离井口还差4米.井深几米?绳子长几米?
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![用一根绳子测量井深,直接量,井外余5米.对折量,离井口还差4米.井深几米?绳子长几米?](/uploads/image/z/4367899-19-9.jpg?t=%E7%94%A8%E4%B8%80%E6%A0%B9%E7%BB%B3%E5%AD%90%E6%B5%8B%E9%87%8F%E4%BA%95%E6%B7%B1%2C%E7%9B%B4%E6%8E%A5%E9%87%8F%2C%E4%BA%95%E5%A4%96%E4%BD%995%E7%B1%B3.%E5%AF%B9%E6%8A%98%E9%87%8F%2C%E7%A6%BB%E4%BA%95%E5%8F%A3%E8%BF%98%E5%B7%AE4%E7%B1%B3.%E4%BA%95%E6%B7%B1%E5%87%A0%E7%B1%B3%3F%E7%BB%B3%E5%AD%90%E9%95%BF%E5%87%A0%E7%B1%B3%3F)
用一根绳子测量井深,直接量,井外余5米.对折量,离井口还差4米.井深几米?绳子长几米?
用一根绳子测量井深,直接量,井外余5米.对折量,离井口还差4米.井深几米?绳子长几米?
用一根绳子测量井深,直接量,井外余5米.对折量,离井口还差4米.井深几米?绳子长几米?
设绳子长x米.
x-5=2分之x+4
x-2分之x=5+4
2分之x=9
x=18
井深=18-5=13米
你的采纳是我回答的动力!
x/2+4=x-5
x+8=2x-10
x=18
18-5=13
绳长18m,井深13m