3x+4y=15 2x-4y=10 解放程组,如题

3x+4y=15 2x-4y=10 解放程组,如题 解放程组2X-3Y=X+2=3X+Y 2/5x-1/4y=420怎么解放程列如：x+y=20001/3x+1/2y=100 解放程：（2X+3Y-Z-2)的绝对值+（3X+2Y-Z-2)的平方+根号(4X-5Y+6Z+17)=0 解放程组2x-y=7,5x+3y+2z=2,3x-4z=4 用加减消元法解放组2x+3y=12①,3x+4y=17②,先消去x的具体方法是(),得() 解放程x+y-z=4,2x-y+x=5,x-3y+x=-2 3x-2y=8,2y+3z=1,x+5z=73x-2y=8,2y+3z=1,x+5z=7 方程,过程, 跪求! 2（x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。 怎样解方程组x+y=8 y+z=6 z+x=4按正确的3元一次解放程的方法解 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 3x+x+4y+(90+10)x=3y-(2x+y)+510y=34x {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 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