Respuesta :
When combining like terms, we add or subtract the _coefficients_and keep the _x value_ the same.
Example: 7x-9+8x
7x and 8x are like terms. Add 7+8 to get 15 then add on the "x". The answer would be -9+15x
Example: 7x-9+8x
7x and 8x are like terms. Add 7+8 to get 15 then add on the "x". The answer would be -9+15x