Isabelle's ticket costs $20.
Her brothers both get the children's discount, and each of their tickets cost x. So the total cost of her brothers' tickets is 2x.
Isabelle has saved $5 and her brothers have saved $5, so the total amount they have saved is $5 + $5 = $10.
Isabelle's job pays $3 per week, so the number of weeks she needs to work to afford the tickets is $20 + 2x - $10 / $3 = 10.
We can simplify this equation to: 20 + 2x - 10 = 30.
Simplifying further, we get: 2x + 10 = 30.
Subtracting 10 from both sides, we get: 2x = 20.
Dividing both sides by 2, we get: x = 10.
The value of x is 10.
#### 10
The answer is: 10
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Isabelle gets a job so she can save enough money to go to a concert with her two brothers. Her ticket costs $20. Her brothers both get the children’s discount, and each of their tickets cost x. Her brothers have saved $5 between the two of them and Isabelle has saved $5. If her job pays $3 per week, how many weeks must she work to afford the tickets?
If we know the answer to the above question is 10, what is the value of unknown variable x?

### Answer:
