5x-6y=11,5x-9y=5如何解这个方程组

3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算 5x-6y=11,5x-9y=5如何解这个方程组 设这间屋子有x张桌子,有y个人.3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 如何解 (X-Y)(X+Y)=5如何解求x,y的值, 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 解方程组：3(x+y)+2(x-y)=11,6(x+y)-5(x-y)=13. 如何解方程组 6x+7y=5 6x-7y=19 方程组 x-3y=2,-2x+6y=5如何解快 快 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 y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 (x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5 解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 {6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1