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25 April, 12:18

A bag contains white marbles and red marbles, 90 in total. The number of white marbles is 6 less than 5 times the number of red marbles. How many white marbles are there?

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  1. 25 April, 12:47
    0
    W = 72

    Step by step explanation:

    White = W

    Red = R

    W + R = 90

    Write an equation

    W = 5R - 6

    Substitute

    5R - 6 = 90

    Add 6 to both sides of the equation

    5R = 90

    Simplify

    90 : 5 = 18

    R = 18

    90 - 18 = W

    W = 72

    Hope this was useful to you!
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