(2np.3r/4r)-(2np-3n)=?

Question

a. -1/2np+3n
b. -1/2np-3n
c. -np/2r+3n
d. 1/2np+3n
e. 1/2np-3n

Please answer and explan

Answer 1

2np*3r/4r = 3np/2
Now subtract the rest

3/2 np - 2np + 3n