Math problem that I don't get.

Question

I don't know how to write a equation for three less than seven times a number equals twenty-four.

Answer 1

Let's change "a number" to 2. What does your equation look like?

7(2) - 3 = 24

Now, let's change 2 back to "a number." We'll call it n.

7n - 3 = 24