Answer:
.
Explanation:
Let x be warmest temperature on May 15.
We have been given that the lowest temperature on May 15 is 2/3 as warm as the warmest temperature on May 15. The lowest temperature on May 15 is
.
We can set our given information in an equation as:
.
Now let us solve for x by multiplying both sides of our equation by 3.



Therefore, the warmest temperature on May 15 was
.