Question Number 131893 by SOMEDAVONG last updated on 09/Feb/21
$$\begin{cases}{\mathrm{x}+\mathrm{y}=\sqrt[{\mathrm{3}}]{\mathrm{a}+\mathrm{b}}}\\{\mathrm{x}^{\mathrm{4}} −\mathrm{y}^{\mathrm{4}} =\mathrm{ax}−\mathrm{by}}\end{cases} \\ $$
x-y-a-b-1-3-x-4-y-4-ax-by-