  In this letter, we show that in a particular braneworld scenario with
variable brane tension, we obtain matter acting as dark energy while the
gravitational constant $G$ promoted to a scalar field on the brane plays the
role of matter (both in the sense they have an 'effective' Equation of State
equivalent to that of dark energy and matter respectively). This result is
interpreted from the Friedmann equation obtained from our model that exactly
matches the standard Friedmann equation of General Relativity with a
cosmological constant $\Lambda$ in terms of the aforementioned quantities. The
universe is assumed to consist of only matter and dark energy in this model
which is a good approximation for our universe.
