Freezing point equation. 10 points

How do you show that this equation:

Molar Mass = (Kf * mass of solute(g) ) / ( mass of solvent(kg) * delta T)

results from this equation:

delta T = Kf * m * i


I can't seem to put stuff together. Any help is greatly appreciated.

Definitions:
m = molality = mol solute / kg of solvent
mol solute = mass of solute / molar mass

dT = Kf x m x i

Substitute for m:
dT = Kf x (mol solute / kg of solvent) x i

Solve for mol solute:
mol solute = (dT x kg of solvent x i) / Kf

Substitute for mol solute:
mass of solute / molar mass = (dT x kg of solvent x i) / Kf

Solve for molar mass:
molar mass = (Kf x mass of solute) / (kg of solvent x i x dT)