Try this plan:
1. to expand the brackets:
34= -m-3;
2. to group number in one side of the equation:
34+3= -m;
3. to add two numbers in the left side of the equation:
37= -m;
4. to multyply the both sides of the equation by the '-1':
-37=m;
5. finally, write the answer:
m= -37.
