已知x比2=y比3=z比0.5,则2x-y+z分之x+3y-z的值
问题描述:
已知x比2=y比3=z比0.5,则2x-y+z分之x+3y-z的值
答
x比2=y比3=z比0.5=t
x=2t
y=3t
z=0.5t
2x-y+z分之x+3y-z
=(2t+3*3t-0.5t)/(2*2t-3t+0.5t)
=10.5 / 1.5
=21/3