如果x/2=y/3=z/4不等于0,那么x+y+z/x+y-z的值是 A.7 B.8 C.9 D.10
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![如果x/2=y/3=z/4不等于0,那么x+y+z/x+y-z的值是 A.7 B.8 C.9 D.10](/uploads/image/z/1691559-63-9.jpg?t=%E5%A6%82%E6%9E%9Cx%2F2%3Dy%2F3%3Dz%2F4%E4%B8%8D%E7%AD%89%E4%BA%8E0%2C%E9%82%A3%E4%B9%88x%2By%2Bz%2Fx%2By-z%E7%9A%84%E5%80%BC%E6%98%AF+A.7+B.8+C.9+D.10)
如果x/2=y/3=z/4不等于0,那么x+y+z/x+y-z的值是 A.7 B.8 C.9 D.10
如果x/2=y/3=z/4不等于0,那么x+y+z/x+y-z的值是 A.7 B.8 C.9 D.10
如果x/2=y/3=z/4不等于0,那么x+y+z/x+y-z的值是 A.7 B.8 C.9 D.10
x/2=y/3=z/4 设x=2a,y=3a,z=4a
则x+y+z/x+y-z =( 2a+3a+4a )/ ( 2a+3a-4a) = 9
选C
设x/2=y/3=z/4=k,则 x=2k,y=3k z=4k
所求式=2k+3k+4k/2k+3k-4k
=9k/k
=9