Build our two algebraic expressions first:

9 divided by the sum of x and 4

9/(x + 4)

6 divided by x minus 4

6/(x - 4)

The phrase

*is equal to*means and equation, so we set the algebraic expressions equal to each other:

**9/(x + 4) = 6/(x - 4) <-- This is our algebraic expression**

If the problem asks you to solve for x, we cross multiply:

9(x - 4) = 6(x + 4)

To solve for x, we type this equation into our search engine and we get:

x =

**20**