问题描述：
英文的数学题
the ratio of blue marbles to green marbled in a bag is 2 to 5 .there are 25 green marbles how many marbles in which color would you have to add to make the ratio
请回答该问题.并且解释为何要这样算
the ratio of blue marbles to green marbled in a bag is 2 to 5 .there are 25 green marbles how many marbles in which color would you have to add to make the ratio
请回答该问题.并且解释为何要这样算
问题解答：
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