如果X:Y:Z=3:4:5,且2X+3Y-5Z=-14,则X= Y= Z=
2个回答
因为X:Y:Z=3:4:5
所以设x=3a,y=4a,z=5a,
则,原式变为6a+12a-25a=-14
a=2
x=6,y=8,z=10
相关问题
如果X:Y:Z=3:4:5,且2X+3Y-5Z=-14,则X= Y= Z=
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