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> 阅读材料,解答问题材料:利用解二元一次方程组的代入消元法可解形如的方程组.如:由(2)得y=x-1,代入(1)消元得到关于x的方程:将代入得:,方程组的解为请你用代入消元法解方程-九年级数学
阅读材料,解答问题材料:利用解二元一次方程组的代入消元法可解形如的方程组.如:由(2)得y=x-1,代入(1)消元得到关于x的方程:将代入得:,方程组的解为请你用代入消元法解方程-九年级数学
题目简介
阅读材料,解答问题材料:利用解二元一次方程组的代入消元法可解形如的方程组.如:由(2)得y=x-1,代入(1)消元得到关于x的方程:将代入得:,方程组的解为请你用代入消元法解方程-九年级数学
题目详情
阅读材料,解答问题材料:
利用解二元一次方程组的代入消元法可解形如
的方程组.如:由(2)得y=x-1,代入(1)消元得到关于x的方程:
将
代入
得:
,方程组的解为
请你用代入消元法解方程组:
题型:解答题
难度:中档
来源:内蒙古自治区中考真题
答案
解:由(1)得y=2-x,代入(2)得
化简得
,
把
,
分别代入
得:
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解方程组-九年级数学
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题目简介
阅读材料,解答问题材料:利用解二元一次方程组的代入消元法可解形如的方程组.如:由(2)得y=x-1,代入(1)消元得到关于x的方程:将代入得:,方程组的解为请你用代入消元法解方程-九年级数学
题目详情
利用解二元一次方程组的代入消元法可解形如
将
请你用代入消元法解方程组:
答案
把