 
 <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: <hau> Ganin ra'ayin tunani na hankali, samar da tambaya mai ma'ana da amsa. Dalili: Idan n shine adadin takardun kudi na $ 20 to, 2n shine adadin takardun kudi na $ 10. Don haka lissafin zai zama $10 (n) + $20 (n) = $120. Ta hanyar haɗuwa da irin waɗannan sharuɗɗa, daidaitattun ya zama 40n = 120. Don haka, darajar n wadda take wakiltar adadin takardun kudi na $20 ita ce 120 / 40 = 3.  Tambaya da amsa: 