Question Number 151216 by liberty last updated on 19/Aug/21
$$\:\:\:\mathrm{Solve}\:\mathrm{for}\:\mathrm{real}\:\mathrm{number}\: \\ $$$$\:\:\sqrt[{\mathrm{7}}]{\mathrm{x}+\mathrm{3}}\:+\sqrt[{\mathrm{7}}]{\mathrm{6}−\mathrm{x}}\:=\:\sqrt[{\mathrm{7}}]{\mathrm{9}}\: \\ $$
Answered by MJS_new last updated on 19/Aug/21
$$\mathrm{very}\:\mathrm{obviously}\:{x}=−\mathrm{3}\vee{x}=\mathrm{6} \\ $$
Commented by liberty last updated on 19/Aug/21
$$\mathrm{by}\:\mathrm{observe}\:\mathrm{sir} \\ $$