Answer:
B
Explanation:
So we have the equation:

First, let's get rid of the fractions. Multiply both sides by the LCM of 5 and 2, which is 10:

On the left, the 10 gets reduced to 2. On the right, the 10 gets reduced to 5. Thus:

Distribute:

Subtract 6m from both sides:

Add 5 to both sides:

Divide both sides by 4:

And we're done!
The answer is B.