 
 <translate> Lizzy: Shawn collected 40 plain pebbles. He painted 9 pebbles red and 13 pebbles blue. He then divided the remaining pebbles equally into 3 groups, and painted them purple, yellow, and green. What is the difference between the number of blue and yellow pebbles?.
Me: Hmmm, let me think. I think this is the detailed solution: <hau> Shawn ya tattara duwatsu guda 40. Ya zana duwatsu 9 ja da kuma duwatsu 13 shuɗi. Daga nan sai ya raba sauran duwatsun daidai cikin rukuni 3, kuma ya zana su da ruwan hoda, rawaya, da kore. Menene banbanci tsakanin adadin shuɗi da rawaya? Ni: Hmmm, bari in yi tunani. Ina ganin wannan shi ne cikakken bayani: 