To simplify the expression Rx+12r+8r, combine the like terms 12r and 8r to get 20r, resulting in the simplified expression Rx+20r.
The expression Rx+12r+8r involves variables 'R' and 'r'. To simplify it, follow these steps:
Group similar terms: Combine the terms with the same variable.
Rx+12r+8r can be written as Rx+12r+8r=Rx+20r.
The expression cannot be simplified further without knowing the specific values of 'R' and 'r'. If both 'R' and 'r' are considered as variables, the expression Rx+20r is already in its simplest form.
So, the answer to the expression Rx+12r+8r is Rx+20r. If specific numerical values are provided for 'R' and 'r', then further computation or evaluation of the expression can be performed to get a numerical result.