Linear equations

[Abbs_D]

I need help on a problem, I am not sure how to remove the parentheses but I know I should.
(x+6) - (2x+7) - 3x =11/2

Thank you?

 

[Denis]

HINT:
(a - b) = a - b
- (a - b) = -a + b

 

[Abbs_D]

Thank you! makes sense!