解不等式组专项练习60题(有答案)1.\cases {2(x+1)-1 \geqslant 3 \cr 4+x<7} 2.\cases {2x-1 \geqslant 3(x-2)\cr -2x<4} 3.\cases {3x+1>x+3 \cr 2x-1<x+1} 4.\cases {x+3>4 \cr 2x<6} 5.\cases {2x-5 \geqslant 3(x-1)\cr \frac {x}{3}- \frac {x-1}{2}<1} 6.\cases {x<2x+1 \cr 3x-2(x-1)\leqslant 4} 7.\cases {x+3>0 \cr 2(x-1)+3 \geqslant 3x} 8.\cases {3x+1<2(x+2)\cr - \frac {1}{3}x \leqslant \frac {5}{3}x+2} 9.\cases { \frac {x+1}{3}>0 \cr 2(x+5)\geqslant 6(x-1)& \circled {2}} 10.\cases {5x-9<3(x-1)\cr 1- \frac {3}{2}x \leqslant \frac {1}{2}x-1} 11.\cases {2(x-3)\leqslant 5x+5 \cr 4x<3x+1} 12.\cases {2x+3 \leqslant x+6 \cr \frac {x+2}{2}> \frac {x+3}{3} \cdots \circled {2}} 13.\cases {-3(x-2)\leqslant 4-x \cr \frac {1+2x}{3}>x-1} 14.\cases {4x-3<5x \cr \frac {x-4}{2}+\frac {x+2}{6} \leqslant \frac {1}{3}} 15.\cases { \frac {1}{2}(x+4)<2 \cr x-3(x-1)>5} 16.\cases {x- \frac {1+3x}{2}>-3 \cr 5x-12 \leqslant 2(4x-3)} 17.\cases {x-3(x-2)\leqslant 4 \cr \frac {1+2x}{3}>x-1} 18.\cases {1-2(x-1)\leqslant 5 \cr \frac {3x-2}{2}<x+\frac {1}{2}} 19.\cases { \frac {x-3}{2}+3>x+1 \cr 1-3(x-1)\leqslant 8-x} 20.\cases {5x+2>3(x-1), \circled {1} \cr 7- \frac {3}{2}x \geqslant \frac {1}{2}x-1, \circled {