Add link to https://github.com/BerniceChua/phase-0/blob/master/week-4/math/my_solution.rb in variables-methods.rb.
Add link to https://github.com/BerniceChua/phase-0/blob/master/week-4/math/my_solution.rb in variables-methods.rb.

BerniceChua/phase-0,BerniceChua/phase-0,BerniceChua/phase-0