Question
Justin strings some white and grey beads to make a necklace. For every 6 white beads Justin uses, he uses 7 grey beads. He uses a total of 78 white and grey beads for the necklace. How many more grey beads than white beads does he use?
4 m

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Justin strings some white and grey beads to make a necklace. For every 6 white beads Justin uses, he uses 7 grey beads. He uses a total of 78 white and grey beads for the necklace. How many more grey beads than white beads does he use?