6x+5Y=31 2X+3Y=17求X求 Y

6x+5Y=31 2X+3Y=17求X求 Y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知:3x-5y=0,求x/y,x-y/y,x-y/x (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? (3x+2y)+(5x-y)i=17-2i.求x与y 6x-2y=5 8x-3y=-5 求x,y 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. y=x^3-5x^2+2x-8 求y^2求y撇 6X+3Y=5(X+Y)求结果 已知：2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x) x*y=6x-y=1求X Y是多少?X=3 Y=2 求公式! 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y 求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,