We have a condition;
Ag2O→Ag+O2
Above all else, balance the O on the two sides, presently take a gander at the item side. We have 2 oxygen on the right side and on the left side we have just 1 oxygen. To adjust it, put a coefficient 2 on left side before Ag2O .The condition becomes as 2Ag2O→Ag+O2
Presently, again check the product side, There is 1 Ag yet in reactant side there is 4 Ag. Presently put coefficient 4 preceding Ag on the right side. The condition becomes as 2Ag2O→4Ag+O2
Final Answer: Hence, the balanced equation is 2Ag2O→4Ag+O2.