What is the unit rate for $27 for three pairs of pants

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?