MathDB
System of equations

Source: Polish MO second round 2012

February 19, 2012
algebra unsolvedalgebra

Problem Statement

a,b,c,dRa,b,c,d\in\mathbb{R}, solve the system of equations: {a3+b=cb3+c=dc3+d=ad3+a=b \begin{cases} a^3+b=c \\ b^3+c=d \\ c^3+d=a \\ d^3+a=b \end{cases}