Answer:
18
Step-by-step explanation:
Since this is an isosceles triangle, sides AB and sides AC are equal
AB=AC
8x-4 = 5x+11
Subtract 5x from each side
8x-5x-4 = 5x-5x+11
3x-4 = 11
Add 4 to each side
3x-4+4 = 11+4
3x=15
Divide by 3
3x/3 =15/3
x=5
We want to find BC
BC= 4x-2
Since x=5
BC = 4(5) -2
BC = 20-2
BC =18
