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> 解方程或不等式组(每小题4分,共8分)小题1:(1)小题2:(2)-七年级数学
解方程或不等式组(每小题4分,共8分)小题1:(1)小题2:(2)-七年级数学
题目简介
解方程或不等式组(每小题4分,共8分)小题1:(1)小题2:(2)-七年级数学
题目详情
解方程或不等式组(每小题4分,共8分)
小题1:(1)
小题2:(2)
题型:解答题
难度:中档
来源:不详
答案
小题1:1)去分母得:2x+1="x-1 "
……………………………………1分
解得:x=−2 …………………………………………………3分
经检验x=-2是原方程的根
小题2:(2)解出x<3………………………………………………………1分
解出x≥−1……………………………………………………2分
得出−1≤x<3
略
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题目简介
解方程或不等式组(每小题4分,共8分)小题1:(1)小题2:(2)-七年级数学
题目详情
小题1:(1)
答案
小题1:1)去分母得:2x+1="x-1 "
解得:x=−2 …………………………………………………3分
经检验x=-2是原方程的根
小题2:(2)解出x<3………………………………………………………1分
解出x≥−1……………………………………………………2分
得出−1≤x<3