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