2X+6Y=10,2X+3Y=5.5,求x,

x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以（x^2+y^2/y)^2的值 2X+6Y=10,2X+3Y=5.5,求x, 已知：2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x) 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xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y 求几个方程组的答案 ｛2x+y=2 {3x-y=7 x=?y=?{x+2y=50 {3x=2y+6 x=?y=?{x+y=40 {10x+8y=370 x、y=?{x+y=5.8 {y=3x+0.6 x=?y=? 6x+5Y=31 2X+3Y=17求X求 Y x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y y=3(x-y),x=2(x-y)求x,y的值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 x*y=6x-y=1求X Y是多少?X=3 Y=2 求公式! 当2x-y/x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的值.