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Sagot :
Answer:
- x + y = 55
- x/3 +y/5 = 13
- 25
Step-by-step explanation:
You want the equations representing the relations that the total number of swim team members (x) and dive team members (y) is 55, and the number of seniors is 13, comprised of 1/3 of the swim team and 1/5 of the dive team. You also want to know the difference between y and x.
a. Members
Using the given variables to represent the numbers of team members, the equation for the total number of club members is ...
x + y = 55
b. Seniors
The sum of 1/3 of swim team members and 1/5 of dive team members is the number of seniors:
x/3 + y/5 = 13
c. Difference
We can multiply the second equation by 5 and subtract the first to find x:
5(x/3 +y/5) -(x +y) = 5(13) -(55)
2/3x = 10
x = 3/2·10 = 15
y = 55 -15 = 40
The diving club has 40 -15 = 25 more members than the swim club.
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