若2X+5Y-3=0则4X*32Y=若2X+5Y-3=0则4 X(次方)*32 Y（次方）=

若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若|2x-y+5|+(x+2y-4)的平方=0,则（2x-y)的三次方-（x-3y)(y-2x)的平方 (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___. 若5x+3y=3x+4y=x+2y+6,则x+y=___ 若|x+y-3|+(x-y-5)^2=0,则x)^2-y^2= 若x/y=4/3 则3x+2y/2x-5y= 若2x-3y=0,求5x+4y/3x-2y 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 若x+y=4,则多项式1/2(x+y)+4(x-y)-3（x-y）-3/2(x+y)-x+y值是（） 若实数x,y满足x的平方+y的平方-4x-2y+5=0,则（x+y）/2x-3= 若x-2y=5,则式子12-x+2y=.以知3x-4y=2x+y则x∶y= 若|x-3|+（y+2）=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 若|x-3|+（y+2）²=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 若2x=3y,则(x*x+y*y)/x*x=?