Lizzy: Michelle uses 40 beads in making a necklace. She uses 5 blue beads and 2 times as many red beads as blue beads. Then she uses the same number of white beads as the blue and red beads combined. If the rest of the beads she uses are silver, how many silver beads does she use?.
Me: Hmmm, let me think. I think this is the detailed solution:
Michelle uses 5 x 2 = 10 red beads. She uses 5 + 10 = 15 white beads. So she uses a total of 5 + 10 + 15 = 30 blue, red, and white beads. Therefore, she uses 40 - 30 = 10 silver beads. Final answer: 10.