若x/y=3/4,求(3x^2-5x+2y^2)/(2x^2-3xy+3y^2)的值答案是6/23,我要过程

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若2x-3y=0,求5x+4y/3x-2y 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4) 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 求函数y=(3x+4)/(x-2) (x 1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值. 4x-3y=5 x^2+y^2=1 求x,y 求5x-2y=x-y=4x-3y-2的解