几道英文数学题麻烦给出中文翻译和解答!1.If 4 less than 3 times a certain number is 2 more than the number,what is the number?2.Set X has x members and set Y has y members.Set Z consists of all members that are in either set X or set

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几道英文数学题麻烦给出中文翻译和解答!1.If 4 less than 3 times a certain number is 2 more than the number,what is the number?2.Set X has x members and set Y has y members.Set Z consists of all members that are in either set X or set
几道英文数学题
麻烦给出中文翻译和解答!
1.If 4 less than 3 times a certain number is 2 more than the number,what is the number?
2.Set X has x members and set Y has y members.Set Z consists of all members that are in either set X or set Y with the exception of the k common members(k>0).Which of following represents the number of members in set

几道英文数学题麻烦给出中文翻译和解答!1.If 4 less than 3 times a certain number is 2 more than the number,what is the number?2.Set X has x members and set Y has y members.Set Z consists of all members that are in either set X or set
1一个数的3倍减去4等于2加这个数,这个数是多少?
答案：3
2setx有x个数,sety有y个数,setz含有setx和sety里面的数除了k个相同的数字,那setz有多少数字?
答案x+y-2k：
LZ你在做sat的题啊?
第二题开始时候我做的x+y-k,晕的,是z不包含相同数字,所以是-2k

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