wolovehudg
∵|3x-9|+|1/2y+1|=0
且|3x-9|≥0,|1/2y+1|≥0
∴3x-9=0,1/2y+1=0
解得x=3,y=-2
∴1/3x-1/2y=z+5/6
(1/3)×3-(1/2)×(-2)=z+5/6
1+1=z+5/6
z=2-5/6
z=7/6
∴字母z=7/6