|x-3|+|y-1/2|=0
因为|x-3|≥0,|y-1/2|≥0
所以|x-3|=0,|y-1/2|=0
x-3=0,y-1/2=0
x=3,y=1/2
3x+2y=3×3+2×(1/2)=9+1=10