Points A, B, and C are collinear and A is between B and C.
AB = 4x-3, BC = 7x+5, and AC = 5x-16.
Find each value.
1. BC (answer: 89)
2. AB (answer: 45)
3. AC (answer: 44)

(i know the answer, i just don’t know how to do it)
PLEASE SHOW YOUR WORK. THANK YOU!