Question 103
Find all pairs $(x, y)$ of real numbers such that
$$
xy^3 = -135, \quad (x+y)y = -6. \quad (Matko Ljulj)
$$
$$
xy^3 = -135, \quad (x+y)y = -6. \quad (Matko Ljulj)
$$
MathNet 2019-part-02 — 184 problems (EN–VI) Question 103
Math Olympiad Vault · MathNet 2019-part-02 — 184 problems (EN–VI)