Answer :
When you open the parenthesis at the right-hand side of the equation
2m + (3m - 4) = 2m + 3m - 4
= 5m - 4
Comparing the left-hand side with the right -hand side
5m is the answer
When you open the parenthesis at the right-hand side of the equation
2m + (3m - 4) = 2m + 3m - 4
= 5m - 4
Comparing the left-hand side with the right -hand side
5m is the answer