若5x-3y-2=0,则10^5x÷10^3y=?

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若(5x+y)(7x+10y)=1/2,则x/y=______;若x+1/x=3,则x^2+1/x^2 若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若|3x-y+5|+(2x+y-10)平方=0,则x=?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【2x²-3y²-10y+5】²+根号x-2y,则x= y= 5(x+y)-2x=0 3x-10(x+y)=2 若x和y互为相反数,则3x-10+3y+y/5x= 若5x+y/7x+10y=1/2,则x/y=? 若7x+10y分之5x+y=1/2,则x/y= 若（5x+y）／(7x+10y)=1/2则x/y= 若|x+y-3|+(x-y-5)^2=0,则x)^2-y^2= (x+y-5)+|3y-2x+10|=0,求 x,y的值 (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___. 若｜y+5｜+(5x+1)2=0,求-3(2x-y)-｛7x-[6x+2y-(10x-8y)]-x-2(3x-4y)｝的值 若|y+5|+(5x+1)^2=0,求代数式-3(2x-y)-{7x-[6x+2y-(10x-8y)]-x-2(3x-4y)}的值 若｜y+5｜+(5x+1)^2=0,求-3(2x-y)-｛7x-[6x+2y-(10x-8y)]-x-2(3x-4y)｝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