Equation e: m = 4n + 1
equation f: m = 6n + 8

which statement describes a step that can be used to find the solution to the set of equations?

equation f can be written as m = 6(m − 1) + 8.
equation f can be written as m = 4(m − 8) + 1.
equation f can be written as 4n + 1 = 6n + 8.
equation f can be written as n + 1 = 6n + 8.