Answer: It is -62
Step-by-step explanation: It is -62 because if you find the absolute value it is always negetive .
We need more detail to help with the problem.
All angles in a triangle add up to 180
180 = 9 + 15 + 2x - 1 + 3x
180 = 24 - 1 + 2x + 3x
180 = 23 + 5x
180 - 23 = 5x
157 = 5x
Divide both sides by 5
X = 31.4 or 157/5
C - 7.6 = -4
c = -4 + 7.6
c = 3.6