 
 <translate> We know that the time that Anna spends traveling is 20 minutes less than Jenny's travel time: a = j - 20. We also know that the distance both people travel is equal, so their speeds times their travel times must be equal: 15j = 45a. Substituting the first equation into the second equation, we get 15j = 45(j - 20). Multiplying through the parentheses we get 15 j = 45j - 900. Subtracting 45 j from both sides, we get - 30j =  - 900. Dividing both sides by - 30, we get j = 30. Since Anna travels 20 minutes less than Jenny, she traveled 30 minutes - 20 minutes = 10 minutes. So, the answer is 10. <ibo> Anyị maara na oge Anna na-eji eme njem ji minit 20 dị mkpirikpi karịa oge Jenny ji eme njem: a = j - 20. Anyị makwaara na ebe mmadụ abụọ ahụ na-aga hà nhata, yabụ ọsọ ha na oge njem ha ga-aha nhata: 15j = 45a. N'ịgbanwe ntụnyere nke mbụ n'ime ntụnyere nke abụọ, anyị na-enweta 15j = 45(j - 20). N'ịba ụba site na parentheses anyị na-enweta 15j = 45j - 900. Wepụ 45j n'akụkụ abụọ, anyị na-enweta - 30j = - 900. Nkebi abụọ n'akụkụ site - 30, anyị na-j = 30. Ebe ọ bụ na Anna na-eji nkeji iri abụọ eme njem karịa Jenny, ọ na-eji nkeji iri atọ eme njem - nkeji iri abụọ = nkeji iri. Ya mere, azịza ya bụ 10. 