若x-3y+2=0,则11-3x+9y的值为多少

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／X+Y-9／+（2X-Y+3)=0求X与Y的值 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 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 若x+2y分之x-y=3,则代数式x+2y分之2（x-y)-3(x-y)分之x+2y的值为 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 若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若2x²+3y²-8x+6y+11=0,则x+y的值 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）? 若实数x,y满足x+2y-2=0,则3Λx(x次方）+9Λy（y次方）的最小值为... 若根号x+y-1+(y+3)^2=0,则x+y的平方根是? (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___. 若x,y满足条件2x-y≥0,2x+3y≤8,y≥0,则z=x+3y的最大值为 已知x-y-3绝对值+(2x+2y+10)的平方=0,则(x+y)(x-Y)=