Question
Justin has some blue and red beads. The total mass of all his beads is 231 g. He has 4 less blue beads than red beads. The average mass of the blue beads is 6 g. The average mass of the red beads is 11 g. How many beads does Justin have altogether?
3 m

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Justin has some blue and red beads. The total mass of all his beads is 231 g. He has 4 less blue beads than red beads. The average mass of the blue beads is 6 g. The average mass of the red beads is 11 g. How many beads does Justin have altogether?