Given the region R, use the substitutions u = y + x and v = y - 2x to evaluate ∬(R) (2x - y) dA. Your correct answer will include the work to calculate the Jacobian.

a) ∬(R) (2u - 3v) dA
b) ∬(R) (2u + 3v) dA
c) ∬(R) (2u - v) dA
d) ∬(R) (2u + v) dA