
To solve this problem, we need to determine the value of x, which represents the number of investments Mr. Banks made.

Let's break down the information given:

Revenue from each of Mr. Banks' investments: $500
Revenue from each of Ms. Elizabeth's investments: $900
Number of investments made by Mr. Banks: x
Number of investments made by Ms. Elizabeth: 5
We can set up the equation as follows:

Revenue from Mr. Banks' investments * Number of investments made by Mr. Banks = Total revenue from Mr. Banks' investments
$500 * x = Total revenue from Mr. Banks' investments

Revenue from Ms. Elizabeth's investments * Number of investments made by Ms. Elizabeth = Total revenue from Ms. Elizabeth's investments
$900 * 5 = Total revenue from Ms. Elizabeth's investments

We need to find the difference in revenue between Ms. Elizabeth and Mr. Banks:

Total revenue from Ms. Elizabeth's investments - Total revenue from Mr. Banks' investments = Difference in revenue
$900 * 5 - $500 * x = Difference in revenue

Now, let's substitute the given information into the equation and solve for x:

$900 * 5 - $500 * x = 500

$4500 - $500x = 500

To isolate x, we subtract $4500 from both sides of the equation:

$4500 - $4500 - $500x = 500 - $4500

-$500x = -$4000

Finally, we divide both sides of the equation by -$500 to solve for x:

x = -$4000 / -$500

x = 8

The value of x is 8.
#### 8
The answer is: 8
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Mr. Banks and Ms. Elizabeth are entrepreneurs who invest in different income streams and earn revenue from the investments. From each of his x investments, Mr. Banks received $500 in revenue. Ms. Elizabeth also received $900 from each of her 5 investment streams. How much more money did Ms. Elizabeth make from her investments than Mr. There are 500 banks. What is the value of unknown variable x?

### Answer:
