(1)

**Y = 10/25 ( 10 * X - X^2)**

(2)

**20 = 10 * Y + X**

what is the easy way to solve this?

i use the "system" and gives me:

{

**-0.4 * ( X^2 - 10*X) = Y, 20=X + 10*Y**}

i want this (kind of) answer:

(

**X = 0.44 Λ Y = 1.956**) V (

**X = -5.54 Λ Y = 2.45**)

thanks in advance...