Question

Given B is the midpoint of AC, what is AC ?

A. 54
B. 27
C. 6
D. 18

Answer 1

A. 54

The fact that B is the midpoint means that AB = BC so you can set up the equation of
4x+3 = 3x+9

Then solve for x by subtracting 3 from the left and 3x from the right to get

X=6

Finally, plug that back in to your line and solve for the total value

4(6) + 3 + 3(6) +9 = 54