 
 <prompt> John rọ naira $18 lọ sáàtide ṣugbọn o ṣe rí naira kan lẹhin ti o rọ naira kan lẹhin ti o ṣe rí naira $20 ní ọsẹ kan ti o ṣe rí naira $60 lati ra ọkọ pogo titi diẹ ninu ọsẹ kan. <response>: John gbe $18 / 2 = $9 lori Ojo Aiku.
Ni gbogbo, John gba $18 + $9 + $20 = $47 ni ojo meji.
John nilo $60 - $47 = $13 lati ra iwe pogo.

Akojopo ni 13. 