Question

Find BD. Please help me and work it out.

Answer 1

D is the midpoint of line BC which means BD and CD are equal.

Set the two equations equal and solve for x:

3x-3 = x+5

Subtract 1x from each side:

2x-3 = 5

Add 3 to each side:

2x = 8

Divide both sides by 2:

x = 8/2

x = 4

Now we have x, replace x with 4 and solve for BD:

BD = 3(4)-3

BD = 12-3

BD = 9