Answer:
M=92
Step-by-step explanation:
In order to get M by itself, you want to get rid of the -32. To counteract this negative, you do the inverse of subtraction which would be addition. When you add 32 to one side, you have to add 32 to the other side. Your set up would look something like this.
M=60+32
Add 60 and 32 together to get..
M=92