Pls help​

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?

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third