Zach rented a car for $150 plus 50 cents for each mile. This means he paid $0.50 * x for the miles he drove on Monday and $0.50 * 744 for the miles he drove on Thursday.
The total amount he spent is the sum of the rental fee and the cost of the miles: $150 + $0.50 * x + $0.50 * 744.
We are given that the total amount spent is $832, so we can write: $150 + $0.50 * x + $0.50 * 744 = $832.
Simplifying the left side, we get: $150 + $0.50 * x + $372 = $832.
Combining like terms, we get: $522 + $0.50 * x = $832.
Subtracting $522 from both sides, we get: $0.50 * x = $310.
Dividing both sides by $0.50, we get: x = 620.
The value of x is 620.
#### 620
The answer is: 620
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Zach rented a car for $150 plus 50 cents for each mile. He drove x miles on Monday and another 744 miles on Thursday. How much did he spend?
If we know the answer to the above question is 832, what is the value of unknown variable x?

### Answer:
