About 40 swimmers maybe more
For this case we have the following equation:

To find the value of "x", we use the division equality property, that is, we divide by 5 on both sides of the equation:

Thus, using the mentioned property we have to: 
Answer:

Answer:
10
Step-by-step explanation:
Answer:
multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by xyields the multiplicative identity, 1.