I will not only give the answer but help you through solving this incase you are struggling, let's first distribute the -4 on the right side:
7m + 11 = -8m - 12
Now lets rearrange the equation by bringing all terms involving 'm' to one side:
7m + 8m = -12 - 11
Combine like terms:
15m = -23
Now, let's divide both sides by 15 to isolate 'm':
m = -23/15
So, the equivalent equation is:
m = -23/15 <<< Hope this helps!