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30 August, 14:34

John took all his money from his savings account. He spent $48 on a radio and 3/8 of what was left on presents for his friends. Of the money remaining, John put 2/3 into a checking account and the last remaining $100 was left to charity. How much money did John orginally have in his savings account?

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  1. 30 August, 14:59
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    Step-by-step explanation:

    Let a = original amt in the savings account

    "He spent $48 on a radio and 3/8 of what was left on presents for his friends."

    Therefore he kept 5/8 of what was left

    5/8 (a - 48)

    5/8 (a - 30) left

    :

    John then put 2/3 of his remaining money into a checking account and donated the $100 that was left to charity.

    a = 2/3 (5/8a - 30) + 100

    a = 5/12a - 20 + 100

    a = 5/12a + 80

    a - 5/12a = 80

    7/12a = 80

    a = $137.17 originally in his saving acct
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