已知(2x-3)²﹢|2x-y-3|=0,求5(2x-y)-2(6x-2y+2)+(4x-3y-½)
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
已知x和y满足x+3y+|3x-y|=19,2x+y=6,求x,y的值
已知x-5y=0,求分式x²-2xy+y²/3x+y × (y-x)的值
已知实数x,y满足根号x-2y-3 +(2x-3y-5)=0,求x-8y的平方根与立方根
已知:(x+2)²+|x+y-10|=0,求3x²y-[5x²y-﹙2xy-x²
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
已知:‖2x+3y+5‖+(3x+2y-25)²=0,求x,y的值·
已知2x-y/x+3y=2,求代数式﹙4x-2y/x+3y﹚-﹙4x+12y/2x-y﹚的值
(1)已知(x-1)x+2=1,求整数x的值;(2)已知3x=4,3y=6,求9x-y+27x-y的值.
已知x:y=2:3,且二分之2x+y-1,求x、y的值
已知|x-3y-6|+(x+2y-1)的平方=0,求x,y的值
已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y