已知|2x+3y-11|+(3x+2y-14)²=0,求式子3x-2y+5的值
已知| x-3 | + | y-1/2 |=0,求式子3x+2y的值
已知x-y=-3y+5,则式子x+2y-1的值是?
已知实数x,y满足条件|2x+3y+1|+(x+3y+5)²=0,求式子(-2xy)²×(-y
已知3x-y=2x-3y+5,则式子x+2y-1的值是多少?
已知X,Y满足丨x-3丨+跟号y+2=0求式子(x+y)2013的值
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知|x-3|+(y-x-5)2=0,求x、y的值.
已知x-3y=0,y≠0,求x²-2xy+y²分之2x+y×(x-y)的值
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+