n = m - a
================
To solve the equation a = m - n for the variable n, we need to isolate n on one side of the equation.
We can do this by performing inverse operations.
Since n is being subtracted from m, we can add n to both sides of the equation.
This gives us:
Simplifying the right side of the equation gives us:
To isolate n, we can subtract a from both sides of the equation:
Simplifying the left side of the equation gives us: