设远原来沙子有Xt,则水泥有X-6t
所以X(2/7)=X-6-8
5X/7=14
X=19.6
答:原有沙子19.6t
祝你开心
工地上的沙子比水泥多6t.现在用了2天,用去啥子的2/7,用去水泥的数量与沙子相等.水泥还剩8t,原有沙子多少t?
工地上的沙子比水泥多6t.现在用了2天,用去啥子的2/7,用去水泥的数量与沙子相等.水泥还剩8t,原有沙子多少t?
数学人气:148 ℃时间:2020-01-25 18:05:34
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