以下二题任选一题作答:(只列式不计算)①把若干个苹果分给几个小孩,如果每人分3个,那么余7个,如果每
问题解答：
①解：设有x个孩子，则苹果的个数为3x+7，根据题意列不等式1≤（3x+7）-5（x-1）＜5，解得：3.5＜x≤<span class="MathZyb" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal"><table cellpadding="-1" cellspacing="-1" style="margin-right:1px"><tr><td style="border-bottom:1px solid black">11</td></tr><tr><td>2</td></tr></table></span>，因小孩人数只能取整数，故x=4或5，即有小孩4个，有苹果19个；或有小孩5个，苹果22个．②设原计划每天的行程为x公里，由题意，应有：<span dealflag="1" class="MathZyb" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal"><table style="margin-right: 1px" cellspacing="-1" cellpadding="-1"><tr><td style="font-size: 0"><div hassize="21"><div style="background: url('http://hiphotos.baidu.com/zhidao/pic/item/35a85edf8db1cb13633f7ba7de54564e92584b2b.jpg') no-repeat; width:9px; height:6px;overflow:hidden"></div><div style="background-image: url(http://hiphotos.baidu.com/zhidao/pic/item/78310a55b319ebc436713b2d8126cffc1e17167c.jpg); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; width: 9px; overflow-x: hidden; overflow-y: hidden; height: 10.5px; background-position: initial initial; background-repeat: no-repeat repeat; " muststretch="v"></div><div style="background: url('http://hiphotos.baidu.com/zhidao/pic/item/9825bc315c6034a82c2daa37c8134954082376bc.jpg') no-repeat; width:9px; height:9px;overflow:hidden"></div><div style="background-image: url(http://hiphotos.baidu.com/zhidao/pic/item/78310a55b319ebc436713b2d8126cffc1e17167c.jpg); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; width: 9px; overflow-x: hidden; overflow-y: hidden; height: 10.5px; background-position: initial initial; background-repeat: no-repeat repeat; " muststretch="v"></div><div style="background: url('http://hiphotos.baidu.com/zhidao/pic/item/7af40ad162d9f2d3e689635baaec8a136227ccee.jpg') no-repeat; width:9px; height:6px;overflow:hidden"></div></div></td><td><table style="text-align: left; width: 100%; margin-left: 1px; margin-right: 1px" cellspacing="-1" cellpadding="-1"><tr><td>8(x+19)＞2200</td></tr><tr><td style="padding-top:6px">8(x+19)＞9(x?12)</td></tr></table></td><td style="font-size: 0"></td></tr></table></span>，解得：256＜x＜260．所以这辆汽车原来每天计划的行程范围是256公里至260公里．