Find the unknown X; 7 / 12 vs x = 1 / 12

Find the unknown X; 7 / 12 vs x = 1 / 12

x=7;
7 / 12 / x = 1 / 12 = = > 7 / 12x = 1 / 12 = = > 7 / x = 1 = = > x = 7
Is that ok? If it's to the point,