x+3xy-y/2x-xy-2y
=3xy+x-y/2x-2y-xy
=6xy/2(x-y)-xy
=6xy/6xy-xy
=6xy/5xy
=6/5
已知；x-y=3xy,你能用适当的方法求出x+3xy-y/2x-xy-2y的值吗
1个回答
相关问题
-
已知xy/x+y =3,求2x-3xy+2y/-x+3xy-y 的值.
-
已知x+y=3xy,求2x+2y-xy/x+y+2xy的值、
-
已知x^+xy=3,xy+y^=-2,求2x^-xy-3y^的值
-
已知y-x-2xy=0,求3x+xy-3y/y-xy-x的值
-
已知(xy)/(x+y)=6求(3x-2xy+3y)/(-x+3xy-y)的值.
-
.已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
-
已知：x+y=-2,xy=3.求:2(xy-3x)-3((2y-xy)的值
-
已知y=3+xy,求代数式2x+3xy-2y/x-2xy-y的值.
-
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
-
已知x+y=-3 求（2x²+xy+3y²）-（x²-xy+2y²）的值