An odd number of negative factors will give you a negative.
The answer to your question is 45 ✌️
With intersecting lines, the angles opposite the intersection (across the "X") are called vertical angles, and they are identical. Therefore JNK = MNL and KNL = JNM.
So set KNL = JNM:
3(x+14) = 5x+2
3x+42 = 5x+2
3x+42 -42 = 5x+2 -42
3x = 5x -40
3x -5x = 5x-5x -40
-2x = -40
-2x/-2 = -40/-2
x = 20
Now plug that into x for KNL:
KNL = 3(x+14) = 3(20+14) = 3(34) = 102°
Circumference of the circle = pi * diameter = 3.14 * 13 = 40.82
Length of EG = 40.82 * 280 / 360 = 31.7 cm.
4x = 3/8
there are 2 ways to do this...
(1) 4x = 3/8....divide both sides by 4
x = (3/8) / 4
x = 3/8 * 1/4
x = 3/32 <==
or
(2) 4x = 3/8....multiply both sides by 1/4, cancelling out the 4 on the left
x = 3/8 * 1/4
x = 3/32 <==