若8-3y=2y-5,则(________)y=(_____)
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若2x-y=2y-x=15,则x-y=________.
①若(y+5)(y-4)=y^2+ay+b,则a=________,b=_________
若x+y=9,xy=20则 x^2+y^2=_____, (x-y)^2=_____
1.5y+8y-6y=2y-3
若1/x-1/y=3,则分式(2x+3x y-2y)/(x-2xy-y)=_____
x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+__
若(4x-3)的平方+ 2y+1的绝对值=0,则x+2y=________.
若方程组2x+3y=4,3x+2y=3m-3的解满足x+y=1/5,则m=_____
已知(3x-2y+1)²与4x-3y-3互为相反数,则x=________,y=________.
已知(3x+2y-5)²和|5x+3y-8|互为相反数,则x=____,y=_____.
已知二元一次方程组为4x+3y=6,3x+4y=8,则x+y=_____,x-y=_____