∵x:2=y:3
∴3x=2y,即y=3x/2
∴(2x-3y):(x+y)
=(2x-3*3x/2):(x+3x/2)
=(-5x/2):(5x/2)
=-1
【中学生数理化】团队wdxf4444为您解答!
猜你喜欢
- 1汽车的后视镜由______制成(凹面镜,凸面镜),它的好处是__________
- 251年前,全世界人民用生命和鲜血赢得了反法西斯战争的胜利 怎么写缩句
- 3He drove so fast that he didn't see the red lights.He can't stop his car and hit another__改错
- 4一吨标准煤燃烧会产生多少二氧化碳和二氧化硫?
- 5新奇的近义词
- 6Hello!() My name “s Bob()Nice to meet you,too.
- 7把一个棱长20dm的正方体玻璃容器装满水,然后把水倒入一个长25dm,宽16dm的长方体水箱内,求这时水深多少厘
- 8Not only i but also Tom and Jack ______ interested in English because it ______ useful A.is:is B,is:are C ,are:is D are:
- 91000W负载等于多少安电流
- 10分数找规律:10/9,10/3,10/1,(),90/1,(),()