已知x除以2=y除以3=z除以-7≠0
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已知x除以2=y除以3=z除以-7≠0已知x除以2=y除以3=z除以-7≠0已知x除以2=y除以3=z除以-7≠0-0.2X/2=Y/3=Z/-7X/2=Y/33X=2YX=2/3YY/3=Z/-7-
已知x除以2=y除以3=z除以-7≠0
已知x除以2=y除以3=z除以-7≠0
已知x除以2=y除以3=z除以-7≠0
-0.2
X/2=Y/3=Z/-7
X/2=Y/3
3X=2Y
X=2/3Y
Y/3=Z/-7
-7Y=3Z
Z=-7/3Y
X+Y+Z=(2/3Y+Y-7/3Y)/(Y+7/3Y)
=(-2/3Y)/(10/3Y)
=-0.2
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