Answer:

Explanation:
Since you are asking for the value of
, it is reasonable to assume that we are dealing with an equation here and you forgot to type the equal sign. Given that, I assume our equality is
. Let's solve it step-by-step:
Step 1. Subtract 12 from both sides of the equation


Step 2. Combine like terms (m terms)


Step 3. Using the reflexive property of equality: if a = b, then b = a


Step 4. Divide both sides of the equation by -83


We can conclude that the value of m is
.
Next time be more careful writing your question :)