Question

Please help, I’m so confused!

Answer 1

`a = c/(d-r)`

Explanation:

To solve for
`a`, first multiply by
`a` on both sides to get this:

`c = da - ra`

Now, you can factor out an
`a` from the right side to get this:

`c = a(d - r)`

Now divide by
`d - r` in order to solve for
`a` and you get:

`a = c/(d-r)`