 
 <prompt> ```Shawn jụrụ 40 n'ime mmiri nwere n'ihu. O were 9 n'ihu n'efu, na 13 n'ihu n'akọ. O nwere ike ọzọ na ọdịdị n'ime 3 ndị, na were ha n'efu, odo, na acha. Kedu ihe ọ bụla na-agụnyekwara nke akwụkwọ n'akụkọ na n'odo?``` <response>: ```Mepụta nke ọzọ nke ọzọ na ọzọ, Shawn kwadoro ọkara nke 40 - 9 - 13 = 18.
Ọ kwadoro 18/3 = 6 ọkara odo.
Ọdabara nke ọkara n'efu na ọkara odo bụ 13 - 6 = 7.

Ọ bụghị ụdị 7.``` 