Answer:
14
Step-by-step explanation:
Replace n with 1/2
5(1/2 + 3) -7(1/2)
17.5 - 3.5
=14
So, n=14
5(n + 3) -7n
putting value of n
5(1/2 + 3) - 7/2
5(0.5 + 3) - 3.5
5(3.5) - 3.5
