已知:x:y:z=2:3:4,求x+y+z分之3x+2y-z的值
问题描述:
已知:x:y:z=2:3:4,求x+y+z分之3x+2y-z的值
解解答
答
设X=2T,Y=3T,Z=4T,
则(3X+2Y-Z)/(X+Y+Z)
=(6T+6T-4T)/(2T+3T+4T )
=8T/9T
=8/9