Answer:
Bob has one more marble than Kayla.
Explanation:
The complete question in the attached figure
Let
x -----> the number of marbles Bob has
y ----> the number of marbles Kayla has
we have

we know that
To find out how many more marbles Bob has than Kayla, subtract the number of marbles Kayla has from the number of marbles Bob has

Substitute the given values

therefore
Bob has one more marble than Kayla.