What’s the question asking??
A is the mid point ==> AL = AB = 2AB
6x-17=2(2x+3) => 6x -17 = 4x +6 => 2x = 23 =>x=23/2
then just plug x into LB and AB
Subtracting whole numbers does not include subtracting negative numbers, whereas when subtracting integers you can include negative numbers.