I am doing homework can I please get some help?

Really need on these. i have no idea what to do

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

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8