Let's begin by listing out the given information:
S is the midpoint of AK: AS = SK
2x - 1 = 6x - 6
Subtract 2x from each side, we have:
2x - 2x - 1 = 6x - 2x - 6
-1 = 4x - 6
add 6 to each side, we have:
-1 + 6 = 4x - 6 + 6
4x = 5
Divide each side by 4, we have:
x = 5/4
