用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 23:34:46
![用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8](/uploads/image/z/979140-12-0.jpg?t=%E7%94%A8%E4%BB%A3%E5%85%A5%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E7%BB%84%7Bx-y-6%2C2x%2B3y-8+%7B3%EF%BC%88y-2%EF%BC%89%3Dx-17%2C2%EF%BC%88x-1%EF%BC%89-5y-8)
x=0!r=!аja ,m%*n7%aurj6ObG!߂tiە CЕ;!<8%< F;?V7tlz+JE$Sf@d4.gtከC\>
*@{ΗAOAQv
用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
{x-y-6=0 (1)
,2x+3y-8=0 (2)
x-y-6=0
x=y+6
2(y+6)+3y-8=0
2y+12+3y-8=0
5y=-4
y=-4/5
x=26/5
{3(y-2)=x-17,
2(x-1)-5y-8=0
3(y-2)=x-17
3y-6=x-17
x=3y+11
2(3y+11-1)-5y-8=0
6y+20-5y-8=0
y=-12
x=-25