 <translate> Mun san cewa lokacin da Anna ke ciyarwa yana tafiya ne na minti 20 kasa da lokacin tafiya na Jenny: a = j - 20. Mun kuma san cewa nisan da mutanen biyu suka yi tafiya daidai ne, saboda haka saurin su sau lokutan tafiyarsu ya zama daidai: 15j = 45a. Sauya lissafi na farko a cikin lissafi na biyu, muna samun 15j = 45 ((j - 20). Ta hanyar ninkawa ta hanyar iyakance muna samun 15j = 45j - 900. Idan muka cire 45j daga bangarorin biyu, za mu samu -30j = -900. Idan muka raba bangarorin biyu da -30 sai mu samu j = 30. Tun da yake Anna ta yi tafiyar minti 20 kafin Jenny, ta yi tafiyar minti 30 - minti 20 = minti 10. Amsar ita ce 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. 