2x+5≤3(x+2)2x+5<=3x+6-x<=1∴x>=-1 x–1/2两边乘以6得3x-3<2x∴x<3∴不等式组的解集是-1<=x<3
2x5≤3(x+2)10-6≤3xx≥4/3x–1/23x-3/22x<3/2x<3/4
