The factory made 12000 dolls and their associated accessories.
Each doll has 2 shoes, which means 12000 dolls have 2 * 12000 = 24000 shoes.
Each doll has x bags, which means 12000 dolls have x * 12000 = 12000x bags.
Each doll has 1 set of cosmetics, which means 12000 dolls have 1 * 12000 = 12000 sets of cosmetics.
Each doll has 5 hats, which means 12000 dolls have 5 * 12000 = 60000 hats.
The total number of accessories is the sum of the number of shoes, bags, sets of cosmetics, and hats: 24000 + 12000x + 12000 + 60000 = 96000 + 12000x.
The total number of dolls and accessories is the sum of the number of dolls and the number of accessories: 12000 + (96000 + 12000x) = 108000 + 12000x.
The time required to make each doll is 45 seconds, so the total time required to make all the dolls is 12000 * 45 = 540000 seconds.
The time required to make each accessory is 10 seconds, so the total time required to make all the accessories is (96000 + 12000x) * 10 = 960000 + 120000x seconds.
The total combined machine operation time required to manufacture all of the dolls and their accessories is the sum of the time required to make the dolls and the time required to make the accessories: 540000 + (960000 + 120000x) = 1500000 + 120000x.
We are given that the total combined machine operation time is 1860000 seconds, so we can write: 1500000 + 120000x = 1860000.
Solving for x, we get: x = 3.
The value of x is 3.
#### 3
The answer is: 3
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Last month, a factory made 12000 dolls and their associated accessories.  The accessories for each doll included 2 shoes, x bags, 1 set of cosmetics, and 5 hats.  If each doll took 45 seconds to make and each accessory took 10 seconds to make, what was the total combined machine operation time, in seconds, required to manufacture all of the dolls and their accessories?
If we know the answer to the above question is 1860000, what is the value of unknown variable x?

### Answer:
