Bisect: To divide something such as a line or angle into two sections of the same length.
This means that length [tex]AB[/tex] = length [tex]BC[/tex]. Set up the equation:
[tex]2x - 3 = x + 4[/tex]
Let's simplify the variables. First have -3 and x switch places:
[tex]2x - x = 4 + 3[/tex]
Which leaves you with
[tex]x = 7[/tex]
You are left with x = 7. Plug in the value of x below:
[tex]2(7) - 3 = (7) + 4[/tex]
= [tex]14 - 3 = 7 + 4[/tex]
Which means that line [tex]AB[/tex] has a length of 11 units.
