是3x+2y-x分之x-y-z吗?还是3x+2y-z分之x-y-z
设x/2=y/3=z/4=K
则x=2k,y=3k,z=4k
x-y-z/3x+2y-z=2k-3k-4k/6k+6k-4k=-5k/8k=-5/8是3x+2y-z分之x-y-z我的过程便是