To solve this problem, we need to determine the value of x, which represents the cost of the car Mr. Lalande wants to buy.
Let's break down the information given:
Inheritance from Aunt Adeline: 20,000 euros
Amount paid upfront to leave with the car: 3,000 euros
Number of monthly installments: 6
Amount paid each month: 2,500 euros
We can set up the equation as follows:
Cost of the car - Amount paid upfront = Total amount to be paid in installments
x - 3,000 = 6 * 2,500
Let's simplify and solve for x:
x - 3,000 = 15,000
To isolate x, we add 3,000 to both sides of the equation:
x - 3,000 + 3,000 = 15,000 + 3,000
x = 18,000
The value of x is 18,000 euros.
#### 18000
The answer is: 18000
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Mr. Lalande inherited 20,000 euros from his old aunt Adeline. He is very happy because he will be able to afford the car of his dreams, a superb car worth x €. He goes to the dealership and tries the car. He decides to take it, but instead of paying for everything right away, he chooses to pay in several installments. He pays 3,000 euros to be able to leave with the car and the seller offers to let him pay the rest in 6 monthly installments. How much does Mr. Lalande has to pay 2500 every month.

### Answer:
