Answer:
Evelyn has 11 rocks.
Explanation:
I first made an equation for the father's rocks.
5 + 4x = 49
X is Evelyn's rocks. We subtract the 5 from each side to get,
4x = 44, dividing each side by 4, we get X = 11.
We can double-check our answer by multiplying 11 by 4 and adding 5 to it. We get 49 doing this, proving our answer.