solve the system of equations below. State your answer in the form (x, y, z). In the area below prove mathematically this answer is correct. All steps need to be shown to earn full credit. (6 points)

Anyone know? will mark brainliest if correct!

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park what is the unit rate and what does it represent in the context of the situation?