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What is the length of side BC of the triangle?

Answer:
BC = 24
Step-by-step explanation:
since ABC is an isosceles triangle
<C = <B, then AC = AB
AC=AB
x+8 = 2x-1
subtract x from each side
x+8-x =2x-1-x
8 =x-1
add 1 to each side
8+1 = x-1+1
9 =x
BC = 3x-3
BC = 3(9) -3
BC= 27-3
BC = 24