Michelle uses 5 blue beads for the necklace.
She uses 2 times as many red beads as blue beads, so she uses 2 * 5 = 10 red beads.
The total number of blue and red beads is 5 + 10 = 15 beads.
Michelle uses the same number of white beads as the combined blue and red beads, so she uses 15 white beads.
The total number of blue, red, and white beads is 5 + 10 + 15 = 30 beads.
Michelle uses a total of 40 beads for the necklace.
So, the number of silver beads she uses is 40 - 30 = 10 beads.
#### 10
The answer is: 10
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Michelle uses a total of 40 beads to make a necklace, with 5 blue beads, 2 times as many red beads as blue beads, and the same number of white beads as the combined blue and red beads, how many silver beads does she use in total?

### Answer:
