Can someone please solve this problem Algebraically?...please...

s + n = 500
5s + 10n = 4,000

At a high school football game, admission is $5 for students and $10 for non-students. The school made $4,000 from admissions at the first game, which 500 people attended. How many students and non-students were at the game? Earlier you wrote the system of equations that models this situation. In this activity, you will solve this system of equations.