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10 August, 04:02

Jack is 2 times as old as lacy. 6 years ago the sum of their ages was 24. How old are they now?

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  1. 10 August, 06:34
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    Lucy = x

    now we set up our equation

    if we know that 6 years ago their ages were 18 combined, then we know that something - 6 = 18

    since we also know that jack is 2 times lucy now

    then the entire formula would be

    2x - 6 = 18 to solve we add 6 to both sides 2x - 6 + 6 = 18 + 6 the 6s on the left cancel because when you have a positive and negative of the same number it always = 0 we get 2x = 24

    then divide both sides by 2 to get the answer

    2x / 2 = 24 / 2 the 2s on the left cancel

    and you get x = 12
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