6x-3y=-3,5x-9y=4
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6x-3y=-3,5x-9y=46x-3y=-3,5x-9y=46x-3y=-3,5x-9y=46x-3y=-3可以约简为2x-y=-1y=2x+1,带入5x-9y=4中5x-9(2x+1)=413x
6x-3y=-3,5x-9y=4
6x-3y=-3,5x-9y=4
6x-3y=-3,5x-9y=4
6x-3y=-3可以约简为2x-y=-1
y=2x+1,带入5x-9y=4中
5x-9(2x+1)=4 13x=-13 解得x=-1
已知X=11Y,(X-2)*3=Y,(X-4)*5=Y,(X-6)*7=Y,(X-8)*9=Y ,求X、Y各是多少?
3x=4y,则x/y=( ),y-x/y=( )
6x-3y=-3,5x-9y=4
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2),2x+4y+3z=9,3x-2y+5z=11,5x-6y+3z=1.
|x|=4 |y|=3 则|x-y|=y-x怎么做,
初中数学题(-x-y+5)-(4x+3y-1)-(-4x-5y) 其中x-y=-10
x平方-y平方=6,x-y=3,则x=?.y=?
y=5;x=14;y=((x=3*y,x+6),x-1); printf(''x=%d,y=%d'y=5;x=14;y=((x=3*y,x+6),x-1);printf(''x=%d,y=%d'',x,y);
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y=
解方程组:{4x+6y=9,2x+3y=5
解方程组4x+3y=3,3x+5y=-6,求x,
(1)3x+4y=3.6 (2)4x+10y=3.6 (3)x+2y=9 5x-10y=8 15x-10y=8 3x-2y=﹣1(1)3x+4y=3.6 5x-6y=8 (2)4x+10y=3.6 15x-10y (3)x+2y=9 3x-2y=﹣1
3x(2x+y)-2x(x-y),其中x=1,y=1/5
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)