Final answer:
To solve the problem, set up a system of equations using the given information and find the value of x when the costs are equal.
Step-by-step explanation:
To solve this problem, we need to set up a system of equations using the given information and then solve for the variable x. Let's define:
y1 = 15x + 100
y2 = 20x + 50
Where y1 represents the cost for the first subscription, y2 represents the cost for the second subscription, and x represents the number of people.
We want to find the value of x for which y1 = y2. So we can set up the equation:
15x + 100 = 20x + 50
Simplifying the equation, we get:
5x = 50
Dividing both sides by 5, we find:
x = 10
Therefore, for 10 people, the costs for both subscriptions will be the same.