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16 June, 19:54

A bag contains yellow marbles and red marbles, 65 in total. The number of yellow marbles is 5 more than 4 times the number of red marbles. How many yellow marbles are there?

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  1. 16 June, 20:59
    0
    53

    Step-by-step explanation:

    You make formulas for it.

    Y = yellow marble and r = red marbles

    So we know y+r=65

    and y=5+4r because there are 5 more (plus) and 4 times (multiply) yellow marbles

    so now we make y+r=65 to have r = so you subract to the y so you get r = 65-y

    now you plug that into your other formula

    y = 5 + 4 (65-y)

    distribute

    y=5 + 260-4y

    add common numbers

    y=265-4y

    add 4y from both sides

    5y=265 (it is 5y because there is already a 1y on that side and 1y+4y=5y

    then divied both sides by 5 y=53
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