Hey!
First, let's write the problem.
[tex]M+2-4=3[/tex]
Subtract the numbers, we would do the following operation, [tex]2-4=-2[/tex]
[tex]M-2=3[/tex]
Add 2 to both sides.
[tex]M-2+2=3+2[/tex]
This tells us that our final answer would be,
[tex]M=5[/tex]
Thanks!
-TetraFish