解方程x+y=m+2 4x+5y=6m+3
联立两个方程：
x+y=m+2 ①
4x+5y=6m+3②
这个方程怎么解?需要具体步骤
人气：303 ℃ 时间：2020-05-12 13:57:20
解答
4x+4y=4m+8③,用上面的②式减③式得到y=2m-5.代入上面的①式得到x=7-m,由于x>0,y>0所以结果是2.5
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