Answer: x=59
for other angles just plug in x
Explanation:
2x+5, (3/2)x, 4x - 115
Lets do it part by part. Im assuming 4x-15 is an obtuse angle and not part of the triangle. You can use the thoerem that two angles on a flat line add up to 180.
(4x-115) + x= 180
5x=295
x=59
4*59-115= 121
So that angle is 121 deg