Answer: 5,184 pages
Explanation:
Equation: 8,421 - 3,237 = p or p + 3,237 = 8,421
Knowing that Brooke read 3,237 pages in the fourth grade, the remainder is going to be the amount of pages she read in the fifth grade.
With the information given and the variable (p) we can use this to create an equation and find the answer.
Hope this helps
[7th Grader]