Question

已知X分之一加Y分之一等于6,求x加2xy加y分之2x减3xy的值

哦，后面少了个加2y𡿨在3Xy后面）

Answer 1

1/x+1/y=6
(2x-3xy)/(x+2xy+y)
=(2/y-3)/(1/y+2+1/x)
题目有没有打错？

追问

见补充
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追答

1/x+1/y=6
(2x-3xy+2y)/(x+2xy+y)
=(2/y-3+2/x)/(1/y+2+1/x)
=(2*6-3)/(6+2)
=9/8