已知|2m-6|+(3m-n-5)²=0,且(3n-2m)x

已知|2m-6|+(3m-n-5)²=0,且(3n-2m)x
已知|2m-6|+(3m-n-5)²=0,且(3n-2m)x

已知|2m-6|+(3m-n-5)²=0,且(3n-2m)x
2m-6=0,m=3
把m=3代入
9-n-5=0,n=4
把m=3和n=4代入
6x

2m-6=0
3m-n-5=0
∴m=3
n=4
(3n-2m)x<15
∴6x<15
x<5/2
当x<=-5/2时 原式=-(2x+5)-(5-2x)+3=-7
当-5/2