Of course I'll help.
Answer:
The answer would be m + 11.7
Explanation:
1) First, you have to Remove the parentheses.

2) then, you have to collect like terms for the equation.

3) Now, Simplify what's insides the parentheses which is 3.1 + 8.6 and its equal to 11.7.

so, therefor, The answer is m + 11.7
hope it helps.