Answer:
x = 5
Step-by-step explanation:
Given that B is at the midpoint of AC, then
AB = BC ← substitute values
3x + 8 = 5x - 2 ( subtract 5x from both sides )
- 2x + 8 = - 2 ( subtract 8 from both sides )
- 2x = - 10 ( divide both sides by - 2 )
x = 5
