若x,y满足1/3|x-y|+|y-1/3=0|,则9x-3y的值等于几?
问题描述:
若x,y满足1/3|x-y|+|y-1/3=0|,则9x-3y的值等于几?
答
x-y=0
y-1/3=0
∴x=y=1/3
9x-3y
=6x
=6*1/3
=2