Answer: 42
Explanation:
First of all, referencing the data given, lines M and N are definitely not parallel, and intersect.
However, considering the system included in the question, you may solve for x in a plethora of ways, assuming both expressions are complete, and equal to f(x).
4x - 24 = y
3x + 18 = y
Using the elimination method, consolidate these equations into:
x - 42 = 0
x = 42
Hope it helps :) and post a more complete question if this isn't the answer you were looking for.