4m - 2m + 3m = 5m

The equation is an identity, meaning it is true for all values of m.

Step 1: Combine like terms on the left side: (4 - 2 + 3)m = 5m.

Step 2: Simplify: 5m = 5m.

Step 3: Since both sides are equal, the equation is true for all real numbers m.