1/2 (6x--x)=ax+x+b. what is the value of a-b

1/2 (6x-4)-(3-x)=ax+x+b
3x - 2 - 3 + x = (a+1)x + b
4x - 5 = (a+1)x +b

compare constants:
b = -5

compare coefficients of x:
a +1 = 4
a = 4-1
a = 3

so, a-b = 3 - (-5) = 8

Iwas in a argument about a certain class grade with my teacher. it was a ‘a-’when i felt that i deserved a ‘a’. i showed him (my teacher) why i felt i derserved so. i questioned what i got wrong and showed him what i learned. i look back to that teacher with nothing but love and support because that’s the class that i actually learned the most. the moral of the story is to see where the other person is coming from and what they have done. also, when in a conflict, never attack the persons character. this will just make the argument end poorly.