Combine like terms: 11r + 3 - 12 + 2r

11r + 2r = 13r

3 - 12 = -9

13r-9

13r-9

thanks

To combine like terms in this expression, we need to combine the coefficients of the variables. In this case, we have 11r and 2r as like terms.

First, let's add the coefficients of 11r and 2r together. 11 + 2 equals 13. Therefore, the combined term for 11r and 2r is 13r.

Next, let's combine the constants, which in this case are 3 and -12. 3 - 12 equals -9.

Putting it all together, the simplified expression becomes 13r - 9. This is the result after combining like terms.