Respuesta :
Answer:
Brianna has to give Josh 35 seashells.
Step-by-step explanation:
In order to make it equal, I subtracted 10 from 260 and 240. This gives me 250 and 250. Then, I subtracted 25 from 250, and added 25 to the other 250, to give me 225 and 275 as a result. So, 25 + 10 = 35 seashells.