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22 April, 16:06

Parnell unvested a total of $14000 in two accounts. After a year, one account lost 7.7% while the other account gained 2.5%. In total, Parnell lost $517. Write a system of equations to find how much money Parnell invested in each account.

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  1. 22 April, 19:54
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    Answer: the equations are

    x + y = 14000

    0.077x - 0.025y = 517

    Step-by-step explanation:

    Let x represent the amount invested in first account.

    Let y represent the amount invested in second account.

    Parnell invested a total of $14000 in two accounts. It means that

    x + y = 14000

    After a year, first account lost 7.7%. The amount lost in the first account is 7.7/100 * x = 0.077x.

    The amount left in the first account is

    x - 0.077x = 0.923x

    On the other account gained, he gained 2.5%.

    The amount gained in the second account is 2.5/100 * y = 0.025y

    The amount left in the first account is

    y + 0.025y = 1.025y

    Total amount in first account and second account presently is

    0.923x + 1.025y

    Total amount in first account and second account initially is

    x + y

    Amount lost is

    x + y - (0.923x + 1.025y)

    = 0.077x - 0.025y

    In total, Parnell lost $517. Therefore

    0.077x - 0.025y = 517
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