求解方程组x/2=y/3=z/5 2x+3y-z=16

问题描述:

求解方程组x/2=y/3=z/5 2x+3y-z=16
为齐全

因为x/2=y/3=z/5 所以 x=2/5Z=0.4Z ,y=3/5Z=0.6Z ,2x+3y-z=16,2*0.4Z+3*0.6Z-Z=16,0.8Z+1.8Z-Z=16,2.6Z-Z=16,1.6Z=16,Z=10,X=0.4Z=4,Y=0.6Z=6