Answer:
Step-by-step explanation:
she had both on May 5
swimming lessons every 5th day
5,10,15,20
diving lessons every 3rd day...
3,6,9,12,15
so they both have a common multiple of 15
so fifteen days after May 5 = May 20 <==
X=2.6
The answer is 87.12
Just check it once