First find the length of the triangle opposite the 16, to find the total length of that side.
14 * 16 = 8/ missing length
missing length = 224 / 8
missing length = 28
So now we know the length of that side of the triangle is 28 +14 = 42
8x - 6 is the length of that side so we get:
8x-6 = 42
add 6 to each side:
8x = 48
Divide both sides by 8:
x = 48/8
x = 6
