 
<translate> Lizzy: Milena dị afọ asaa, nne nne ya kakwa ya okpukpu itoolu. Nna nna Milena ji afọ abụọ tọọ nne nne ya. Afọ ole dị n'agbata Milena na nna nna ya? Mụ: Hmmm, ka m chee echiche. Echere m na nke a bụ ihe ngwọta zuru ezu: <eng> Lizzy: Milena is 7 years old, and her grandmother is 9 times older than her. Milena's grandfather is two years older than her grandmother. What is the age difference between Milena and her grandfather?.
Me: Hmmm, let me think. I think this is the detailed solution: 