Neville travels to and from work by train where he spends 15 minutes walking, as well as the time on the train, and he does the whole trip 10 times each week. In total Neville spends 500 minutes traveling each week.
Let's say that n is the number of minutes for one train trip.
Write an equation that describes the situation using addition and multiplication.
n = (15 + n) + n
n = (15 + n) + n + (15 + n) + n + ... + (15 + n) + n
n = 10(15 + n) + 10n
500 = 150 + 10n + 10n
500 = 150 + 20n
350 = 20n
n = 17.5
Therefore, the equation that describes the situation is n = 17.5.