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5 March, 01:38

Kyle spends an equal amount of money each day. After 4 days, he had 4/5 of his money left. After another 10 days he had $30 left. How much money did Kyle begin with?

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  1. 5 March, 01:51
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    4 days spending equal amounts so if x is how much he spends per day and y is the original amount then 4x=1/5y bc he has 4/5 left meaning what he spent was 1/5 of the original and after 10 more days which was 14 total he spent all but 30 so the total minus 30 will be how much kyle spent so

    14x=y-30 which is y = (14x+30) and substitute that in for y in 4x=1/5y so 4x=1/5 (14x+30)

    20x=14x+30

    6x=30

    x=5 and plug that in either of the original equations 4 (5) = 1/5y

    y=100

    so he had $100 and spent $5 per day
  2. 5 March, 02:02
    0
    In 4 days he spends 1/5 of his money

    to find unit amount per day

    1/5 divided by 4

    which equals 1/20

    kyle spends 1/20 of his total money per day

    so after 14 days, he has spent 14/20 of his money

    20/20-14/20=6/20 or the amount of money he has left

    6/20=$30

    if 6/20=$30, then 1/20 equals $5 (30/6)

    if 1/20 of Kyles money = $5

    5*20 = $100

    kyle started with $100
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