NO. IM SORRY. I DID NOT MEANT THAT. DONT TRUST MY ANSWER.
Delete my answer due to my stupidity
Answer:
b. 7
k = 29 i think tho
5k - 3 + 9 + k = 180
6k + 6 = 180
6k = 174
k = 29
14(2×-1) is the factorization of this expression
