Ann earned a total of $879 in simple interest from two separate accounts. In an account earning 9% interest, Ann invested $2,300 more than three times the amount she invested in an account earning 5%. How much did she​ invest in each account?

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets, x, and the number of student tickets, y. find the solution and explain what it means. i'll you if you me