During a recent telethon, people pledged $25 or $50. Twice as many people pledged $25 as $50. Altogether, $18,000 was pledged. How many people pledged $25?

N*25+ N/2 *50=18000

solve for N.

360 people pledged $25-9,000

180 people pledged $50 - 9,000

To find the number of people who pledged $25, we can use a system of equations. Let's assume the number of people who pledged $50 is x.

According to the problem, twice as many people pledged $25 as $50, so the number of people who pledged $25 is 2x.

We also know that the total amount pledged is $18,000. The amount pledged by each person who pledged $25 is $25, and by each person who pledged $50 is $50.

So we can create an equation for the total amount pledged:

25 * (2x) + 50 * x = 18,000

Simplifying the equation:

50x + 50x = 18,000

100x = 18,000

Dividing both sides by 100:

x = 180

Therefore, the number of people who pledged $50 is 180. Since twice as many people pledged $25, the number of people who pledged $25 is 2 * 180 = 360.

So, 360 people pledged $25.