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15 April, 07:17

A bag contains yellow marbles and blue marbles, 23 in total. The number of yellow marbles is 7 less than 2 times the number of blue marbles. How many yellow marbles are there?

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  1. 15 April, 07:25
    0
    8

    Step-by-step explanation:

    yellow marbles=2b-7

    blue marbles=2b

    2b+2b-7=23

    4b=23+7

    4b=30

    b=30/4

    b=7.5

    yellow marbles=2b - 7

    2 x 7.5 - 7

    15 - 7

    =8
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