Answer:
BC = 25 units
Step-by-step explanation:
The triangle is isosceles, so sides AB and AC equal each other.
4x+1=2x+23.
If you subtract 1 from both sides and 2x from both sides you end up with 2x=22.
Divide by 2 and you get x=11.
BC = 3x-8.
Substitute and you get 3(11)-8=33-8= 25 units
