3x-3=y+5 5y-5=3x+15的解答
3x-3=y+5 5y-5=3x+15的解答
3x+y=14 5x+y=20 求x.y的解 详细的解答过程?
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
方程组解答.1、2x-3y=8和5y-7x=5
5x=3y,(2x+y)的平方=5x(x+y)+9
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)