8x+10y=9445（x+y）=530请写出详细的解题步骤和公式依据答案是y=48

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 y+y+x=10,x+y+x=8,y=?,x=? X+Y-8X+10Y+41=O,求X/Y-Y/X的值 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 化简 x / y(x+y) - y / x(x+y) = 已知x²+y²-8x+6y+25=0,求（x-y+4xy/x-y）（x+y-4xy/x+y） x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空 y(x+y)+(x-y)²-（x+y）（x-y）,其中x=-1/3,y=3 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x²+y²+6x-8x+25=0,求（x/x²-y² - 1/x+y）÷y/y-x x+(9-8-y)=10 y+y-(9-8-y)=2 x-y=xx-9.9x xy=11y-1 y=? x=? x+y-xy=?x+(9-8-y)=10y+y-(9-8-y)=2x-y=xx-9.9xxy=11y-1 y=?x=?x+y-xy=? x+x+x+y+y=54,x+x+y+y=46在这种情况下,x=（?）y=（?） x+y=94 8x+10y=834 x+y=10;8x+6y=66 x+y=10 x-y=8 (x+y)/y=8/3则x/y=__ y/x-y=___ (x+y)/y=8/3则x/y=__ y/x-y=___