45-а=9

The equation you provided is:

45 - a = 9

To solve for 'a', you would want to isolate 'a' on one side of the equation. You can do this by subtracting 45 from both sides of the equation:

45 - a - 45 = 9 - 45

This simplifies to:

-a = -36

Now, since we want 'a' and not '-a', we can multiply both sides of the equation by -1 to get:

-a * -1 = -36 * -1

a = 36

So the solution to the equation is a = 36.