To solve this problem, we need to determine the value of x, which represents the amount of money James had in his wallet before finding the 3 bills.
Let's break down the information given:
Number of 20-dollar bills found: 3
Total amount of money after finding the bills: $135
We can set up the equation as follows:
Amount of money in wallet before finding the bills + (Number of 20-dollar bills found * Value of each bill) = Total amount of money after finding the bills
x + (3 * $20) = $135
Let's simplify and solve for x:
x + $60 = $135
To isolate x, we subtract $60 from both sides of the equation:
x + $60 - $60 = $135 - $60
x = $75
The value of x is $75.
#### 75
The answer is: 75
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
James finds 3 bills in his pocket.  They are all 20s. If he already had $x in his wallet, he now has $135. What is the value of unknown variable x?

### Answer:
