Answer: 29
Step-by-step explanation:
3x2= 6
4x2=8
3x5=15
6+8+15= 29
hoped I helped you a bit! Good luck! :)
Say x is the number of books third graders read, the equation would be;
x + 2599 = 4628
to solve;
x = 4628 - 2599
x = 2029 books third graders read