3x - 7 = 5x + 9
3x - 5x = 9 + 7
-2x = 16
x = 16/-2
x = -8 <== ur number
Answer: X equals B.
Step-by-step explanation: all the degrees in a triangle add to be 180, so add up the given angles and subtract from 180 to get the missing angle.
Answer:
4th one
Step-by-step explanation: