Question

Find the following lengths.
X=_____
BC=10

Answer 1

I am in 8th and I thinks it’s 2

Answer 2

see explanation

Explanation:

Since B is the midpoint of AC, then

AB = BC , substitute values

3x - 5 = x + 5 ( subtract x from both sides )

2x - 5 - 5 ( add 5 to both sides )

2x = 10 ( divide both sides by 2 )

x = 5

Thus

BC = x + 5 = 5 + 5 = 10