Question

What is the length of AB

Answer 1

Since line AB and line BC are congruent, you equal them to each, which will give the 'x' to substitute into line AB

$3x = 4x -2$

Subtract -4x from both sides of the equation.

$-x=-2$

Then divide -1 from both sides of the equation.

$x=2$

Then you do 3(2) which is 6.

The answer is B

Answer 2

AB and BC are congruent, so 4x-2= 3x, solve for x and you get x=2.