Question: How to find $M$
1. The problem is to find the value of $M$.
2. To find $M$, we need an equation or context relating $M$ to other known values.
3. If $M$ is part of an equation, isolate $M$ by performing inverse operations on both sides.
4. For example, if the equation is $aM + b = c$, subtract $b$ from both sides: $$aM + b - b = c - b$$ which simplifies to $$aM = c - b$$.
5. Then divide both sides by $a$: $$\cancel{a}M = \frac{c - b}{\cancel{a}}$$ which simplifies to $$M = \frac{c - b}{a}$$.
6. This method applies generally: isolate $M$ by undoing addition/subtraction and multiplication/division.
7. Without a specific equation or context, this is the general approach to find $M$.