\(\dfrac{5}{12}-\dfrac{3}{4}-\dfrac{5}{-3}\\ =\dfrac{5}{12}-\dfrac{3}{4}+\dfrac{5}{3}\\ =\dfrac{5}{12}-\dfrac{9}{12}+\dfrac{20}{12}\\ =\dfrac{5-9+20}{12}\\ =\dfrac{16}{12}\\ =\dfrac{4}{3}\)
5/12-3/4-5/-3
=5/12-9/12-(-20/12)
=5/12-9/12+20/12
=16/12=4/3