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20 July, 07:20

Jake is 10 years older than John. 5 years from now, Jake will be twice as old as John. How old is Jake?

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  1. 20 July, 07:56
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    Jake will be represented by variable a.

    John will be represented by variable o.

    a=o+10

    a+5 = 2 (o+5)

    For the second equations, write a literal equation to solve for a.

    a+5=2o+10

    a=2o+5

    Since we have two expressions that equal a, we can tell that the two expressions are equal.

    o+10 = 2o+5

    10=o+5

    5=o

    We now have the age of John. Plug his age in to find Jake's age.

    a=5+10

    a=15

    Final answer: Jake is 15
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