If he bought 3 stuffed elephants for $45, then I believe you should just be able to divide 45 by 3 and get that each stuffed elephant cost $15. In this particular problem, the discount of $5 off isn't necessary information in solving the problem.
Hello there! So the equation I would use for this word problem is 3(s+5)=45. 3s+15=45 -15 -15 __________ 3s=30 Divide 3 from both sides. s ends up equaling 1. Each stuffed animal elephant cost $10
⇒ Ten to the third power
⇒ Ten to the fifth power