Question

What should I do ? Where it’s say ‘ start here ‘?

Answer 1

Solve the question and go on from there like you were already doing.

Answer 2

Yes, you are going to start the maze in the box that says "Start Here". For the first box we are trying to find the length of AB. Notice that AB + BC = AC. If we substitute our known values for AB and BC, we find that we obtain the equation:

$2x + 4x = 12$

By simplifying our equation and isolating $x$, we can find our answer:

$6x = 12$

$x = 2$

$AB = 2x = 4$

The length of AB is 4.