I might be wrong but it should be 1
Answer:
5+2=7x+3x= 10x is the right answer
As given m is a midpoint of ab. So am is half of ab.
So we can write

As given am = 3x+3 , ab = 8x - 6.
So





So x = 6.
So length of am = 3x+3 = 3*6 + 3 = 21
Sanji scored 44 points more in the third round than in the first round.