Given B is the midpoint of AC AB=10y-8, BC=5y+22

Answer 1

10y - 8 = 5y+22

5y - 8 = 22

5y = 30

y = 6

10(6) - 8 = 60 - 8 = 52 and 5(6) +22 = 30+22 = 52

AC = 104

AB = BC = 52

Answer 2

Since B is the mid point, it means B lies on AC and AB=BC

10y-8=5y+22

So y=6