Final answer:
To add the given expressions, combine like terms by adding or subtracting the coefficients of the same variables.
Step-by-step explanation:
To add the expressions x + xy - 6xy, 7y - 8x + 2x + y, x + xy - 6xy, and 7y - 8x + 2x + 2y, combine like terms by adding or subtracting the coefficients of the same variables.
For example:
- The x terms: x + 2x - 6x = -3x
- The xy terms: xy + xy = 2xy
- The y terms: 7y + y + 2y = 10y
- The constant terms: -8x + 0 - 8x = -16x
Putting it all together, the simplified expression is -3x + 2xy + 10y - 16x + 2y.