x+2y=5x-6y=11
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x+2y=5x-6y=11
x+2y=5x-6y=11
x+2y=5x-6y=11
X+2Y=11
X=11-2Y
(11-2Y)*5-6Y=11
55-16Y=11
Y=11/4
X=11/2
x+2y=11 3x+6y=33
5x-6y=11 3x+6y+5x-6y=44 8x=44 x=44/8 y=22/8
x=11-2y
5(11-2y)-6y=11
55-16y=11
y=11/4
x=22/4
x+2y=5 (1)
x-6y=11 (2)
(1)-(2)得:
8y=-6
y=-3/4
代入(1)得:
x=5+3/2=13/2
所以,方程组的解是:x=13/2;y=-3/4
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x+2y=5x-6y=11
解方程组:3(x+y)+2(x-y)=11,6(x+y)-5(x-y)=13.
大括号x+y/2+x-y/3=11/6 4(x+y)-5(x-y)=7 快
3x+2y=10.5 6x+5y=11y=x=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
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
3x+5y-(x+y)=6 2(x+y)-3x=-7
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=