ANSWER
BC=17 units
EXPLANATION
The given triangle is an isosceles triangle.
We have
AC=AB
This implies that,
[tex]x + 9 = 2x - 8[/tex]
Group similar terms and simplify to get:
[tex]2x - x = 9 + 8[/tex]
[tex]x = 17[/tex]
Side BC is x units. But x=17
Therefore BC is 17 units.
