Answer:
x−14y
Step-by-step explanation:
(7x−8y)+(−6x−6y)
The "sum" is the result of addition
7x-8y-6x-6y
7x−8y−6x−6y
Remove parentheses
7x−8y−6x−6y
Identify like terms
7x−6x−8y−6y
Commutative property
7x−6x
−14y
−8y−6y
Combine like terms
1x−14y
x−14y
Coefficient of 1 isn't needed
