9x+8y=-2 4x+5y=-11 用代入法解

4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 9x+8y=-2 4x+y=-11 用代入法解 9x+8y=-2 4x+5y=-11 9x+8y=-2,4x+5y=-11,y最后等于多少 接二元一次4(x+y)-3(x-y)=9;5(x-y)+2(x+y)=11 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 9x+8y=-2 4x+5y=-11 用代入法解 用代入消元法解方程组： {y=x+1, 3x+4y=11 {x-5y=0, 3x+2y=17 {5x-3y=-1, 3x+y=5 {2x-y+5, 3x+4y=2{x+1分之三 =2y ,2(x+1)-y=11{x+y=9, 3(x+y)+2x=33 用代入消元法解方程组：{y=x+1,3x+4y=11 {x-5y=0,3x+2y=17 {5x-3y=-1,3x+y=5 {2x-y+5,3x+4y=2{x+1分之三 =2y ,2(x+1)-y=11{x+y=9,3(x+y)+2x=33 9y=3x-(x-1),4(x+y)-(2x+4)=8y X+Y=5,2X+Y=8 .4X+3Y=5,X-2Y=4 .这2题用带如消元法解7X-2Y=3,9X+2Y=-19 用加减消元法解 设这间屋子有x张桌子,有y个人.3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 如何解