WILL GIVE BRAINLIEST IF RIGHT!!
If MN = x-5 and NP = 2x-1 and MP = 21, find x

Answer:
MP = MN + NP
21 = (x - 5) + (2x - 1)
21 = x - 5 + 2x - 1
21 = 3x -6
3x = 21 + 6
3x = 27
x = 9