Here is another problem that im confused on i don't understand how to get the numbers for the variable i get that they have to add up together to get 1,025$ but i don't know o how do break it up

parents sold 275 tickets for a fundraiser at the community center. student tickets cost $3, and adult tickets cost $5. the total value of tickets sold is $1,025. which system of equations represents the problem?

3x + y = 275

x + 5y = 1025
y = 275

3x + y = 1025
x + y = 275

3x + 5y = 1025
y = x + 275

x + y = 1025