The zoo has 4 more monkeys than deer. If the zoo has 13 monkeys, how many deer does the zoo have? Write and solve an equation to find the answer, using d to represent the number of deer.(1 point)
The zoo has ? deer.
The zoo has 4 more monkeys than deer.
Let d be the number of deer.
Since there are 4 more monkeys than deer, the number of monkeys is d + 4.
If the zoo has 13 monkeys, then d + 4 = 13.
Subtracting 4 from both sides, we get d = 9.
The zoo has 9 deer. Answer: \boxed{9}.