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> (1)解方程:(2)求不等式组的解集-九年级数学
(1)解方程:(2)求不等式组的解集-九年级数学
题目简介
(1)解方程:(2)求不等式组的解集-九年级数学
题目详情
(1)解方程:
(2)求不等式组
的解集
题型:解答题
难度:中档
来源:不详
答案
(1)x=-1;(2)-2≤x<1.
试题分析:(1)按照去分母、去括号、移项合并同类项、系数化为1的顺序进行计算,最后进行检验方程的解;
(2)先把每一个不等式的解集求出来,最后取它们的公共解集即可.
(1)去分母得:1+6-x=-2(x-3)
去括号得:1+6-x=-2x+6
移项得:-x+2x=-6+6-1
合并同类项得:x=-1
经检验:x=-1为原方程的解;
(2)解不等式(1)得:x<1;
解不等式(2)得:x≥-2;
所以不等式组的解集为 -2≤x<1
考点: 1.解分式方程;2.解一元一次不等式组.
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分式方程的根是()A.B.C.D.-九年级数
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题目简介
(1)解方程:(2)求不等式组的解集-九年级数学
题目详情
答案
试题分析:(1)按照去分母、去括号、移项合并同类项、系数化为1的顺序进行计算,最后进行检验方程的解;
(2)先把每一个不等式的解集求出来,最后取它们的公共解集即可.
(1)去分母得:1+6-x=-2(x-3)
去括号得:1+6-x=-2x+6
移项得:-x+2x=-6+6-1
合并同类项得:x=-1
经检验:x=-1为原方程的解;
(2)解不等式(1)得:x<1;
解不等式(2)得:x≥-2;
所以不等式组的解集为 -2≤x<1
考点: 1.解分式方程;2.解一元一次不等式组.