联立方程 1.{3X+7Y=15 2X-5Y=-19 24X-3Y=0 2X+Y=10 9X+10Y=-2 6X+Y+4

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/17 08:06:58

联立方程 1.{3X+7Y=15 2X-5Y=-19 24X-3Y=0 2X+Y=10 9X+10Y=-2 6X+Y+4.8 1/4X+2Y=7 1/3X=3Y=10

x2-3x=1 x2-6x=-5 x2-6x 9=-5 9 （x-3） =4 x-3=±2 x1=1 x2=5 y2 3y-2=0 y2 3y 2.25=2 2.25 （y 1.5） =4.
再问：我不明白呀 3X+7Y=15 2X-5Y=-19

联立方程 1.{3X+7Y=15 2X-5Y=-19 24X-3Y=0 2X+Y=10 9X+10Y=-2 6X+Y+4 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程有的话已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于