Answer: m=3
Explanation:
Distributing the '4' means multiplying it by everything within the parenthesis next to it. That means, in this circumstance, you are multiplying the 'm' and the '4' by the '4' on the outside the parenthesis.
4(m+4)=28
4m+16=28. Subtract the 16 on both sides.
4m=12
m=3