 <translate> Lizzy: Derek was 6 years old when he had three times as many dogs as cars. Ten years later, after selling some of his dogs and buying 210 more cars, the number of cars became twice the number of dogs. How many dogs does Derek have now if he had 90 dogs when he was six years old?.
Me: Hmmm, let me think. I think this is the detailed solution: <yor> Lizzy: ọmọ ọdún mẹ́fà ni Derek nígbà tó ní àwọn ajá tó pọ̀ ní ìlọ́po mẹ́ta iye àwọn ọkọ̀ ayọ́kẹ́lẹ́. Ọdún mẹ́wàá lẹ́yìn náà, ó ta díẹ̀ lára àwọn ajá rẹ̀, ó sì tún ra mọ́kànlélógún [210] ọkọ̀ ayọ́kẹ́lẹ́ mìíràn, iye ọkọ̀ ayọ́kẹ́lẹ́ tó wà níbẹ̀ sì ti di ìlọ́po méjì iye àwọn ajá tó wà níbẹ̀. Àwọn ajá mélòó ni Derek ní báyìí bí ó bá ní àádọ́rùn-ún ajá nígbà tó wà ní ọmọ ọdún mẹ́fà? Èmi: Hmmm, jẹ́ kí n ronú. Mo rò pé èyí ni àlàyé àlàyé rẹ̀: 