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20 January, 12:27

Jessica's penny bank is 1/3 full. After she adds 80 pennies, it is 1/2 full. How many pennies can Jessica's bank hold?

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  1. 20 January, 12:36
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    3x = B

    (x + 80 = 1/2B) * - 3

    -3x-240 = - 3/2B

    -240 = - 1/2B

    B=480 pennies
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