there is a 10 kg watermelon,95% of it is water.If we put the
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there is a 10 kg watermelon,95% of it is water.If we put the watermelon in t
there is a 10 kg watermelon,95% of it is water.If we put the watermelon in the sunshine for some time,and then only 90% of it is water.Now the watermelon weighs how much ( )kg 要计算过程和结果。 是不是这样的 设新西瓜重为X 列方程: 10*(1-95%)=X*(1-90%) 解出X=5kg.
there is a 10 kg watermelon,95% of it is water.If we put the watermelon in the sunshine for some time,and then only 90% of it is water.Now the watermelon weighs how much ( )kg 要计算过程和结果。 是不是这样的 设新西瓜重为X 列方程: 10*(1-95%)=X*(1-90%) 解出X=5kg.
设Xg水被蒸发
(10*95%)/(10-X)=1-90%
则X=5
剩下10-5=5
(10*95%)/(10-X)=1-90%
则X=5
剩下10-5=5
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