 <translate> Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: If n is the number of $20 bills then 2n is the number of $10 bills. So the equation will be $10(2n) + $20n = $120. By combining like terms, the equation becomes 40n = 120. So, the value of n which represents the number of $20 bills is 120 / 40 = 3.
 The question and answer: <yor> Níwọ̀n bó ti jẹ́ pé ohun tó wà lọ́kàn ẹ ló ń darí rẹ, béèrè ìbéèrè tó bọ́gbọ́n mu kó o sì dáhùn. Àlàyé: Bí n bá jẹ́ iye owó $20 nígbà náà 2n ni iye owó $10 Nítorí náà, àpapọ̀ náà yóò jẹ́ $10 (ìyẹn 2n) + $20n = $120. Bí a bá pa àwọn ọ̀rọ̀ tó jọra pọ̀, a ó rí i pé 40n = 120. Nítorí náà, iye ti n tí ó dúró fún iye owó $20 ni 120 / 40 = 3.  Ìbéèrè àti ìdáhùn: 