问题描述: 若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值 1个回答 分类:综合 2014-09-19 问题解答: 我来补答 x:y:z=3:4:5=6,求x-y+z分之x+y-z的值3y=4x,y=4x/3,3z=5x,z=5x/3x-y+z分之x+y-z=(x-4x/3+5x/3)/(x+4x/3-5x/3)=(4x/3)/(2x/3)=2 展开全文阅读