The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. A certain call between these two cities lasted for x minutes, where x is an integer. How many minutes long was the call?
(1)The charge for the first 3 minutes of the call was $0.36 less than the charge for the remainder of the call.
(2)The total charge for the call was $2.88.