[tex] \frac{2x(3y - 4z)}{3(5x + 4z)} [/tex] Plug in the given values
[tex] \frac{2(4)(3(-1) - 4(-3)}{3(5(4) + 4(-3)} [/tex] Multiply where needed
[tex] \frac{8(-3 + 12}{3(20 - 12)} [/tex] Add and subtract inside the parentheses
[tex] \frac{8(9)}{3(8)} [/tex] Multiply
[tex] \frac{72}{24} [/tex]
3