它的意思是说
两个数字的比是2:3,当每个都加上4之后比值变为5:7,求原来这连个数字的和是多少?
设原来的这连个数为别为2X,3X
2X+4/3X+4=5/7
解得X=8
所以这两个数是16,24
16+24=40
英语问题……two number are in the ratio 2:3.when 4 is added to eac
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