Mark’s father is 55. this is 15 years older than twice mark's age. how old is mark? explain the method used for solving the problem. include a restatement of the problem, the steps you used to solve the problem, the answer, and an explanation of how you know the answer is correct.

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

If you answer right ill give brainliest, : )

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10