3x+2y=9 6x-5y=2球解

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3x+2y=96x-5y=2球解3x+2y=96x-5y=2球解3x+2y=96x-5y=2球解3x+2y=9得到6x+4y=18`````````1式6x-5y=2`````````````````

3x+2y=9 6x-5y=2球解
3x+2y=9 6x-5y=2球解

3x+2y=9 6x-5y=2球解
3x+2y=9得到6x+4y=18`````````1式
6x-5y=2````````````````````````````2式

1式-2式得到 9y=16 得到y=16/9
带到2式得到x=49/27

X=17/27，Y=16/9

3x+2y=9
6x-5y=2

6x+4y=18
6x-5y=2

9x=16
x=16/9

16/3+2y=9
2y=11/3
y=11/6

x=16/9
y=11/6

x是49/27 y是16/9

3x+2y=9......①
6x-5y=2.......②
将①式乘以2，得6x+4y=18.....③
再将③-②，可得y=16/9,再代入①得x=49/27

∵6x+4y=18, 6x-5y=2， ∵9y=16, y=16/9. 代人得：3x=9-32/9=49/9 .∴x=49/27.

x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 5x=3y,(2x+y)的平方=5x(x+y)+9 3x+5y-(x+y)=6 2(x+y)-3x=-7 3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8 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 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20