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sveticcg [70]
3 years ago
10

John took all his money from his savings account. He spent $52 on a radio and 1/2 of what was left on presents for his friends,

Of the money remaining, John put 4/13 into checking account and the last remaining $180 was left to charity. How much money did John originally have in his savings account?
Mathematics
1 answer:
Nadya [2.5K]3 years ago
7 0

Answer:

John had $572 in his savings account.

Step-by-step explanation:

Let the total amount John took from his savings account be T.

He spent $52. That means he has $(T - 52) left.

He then spent 1/2 of what was left on presents for his friends. That is:

\frac{1}{2}  * (T - 52) = \frac{T - 52}{2}

Which means he is left with another half of what was left, that is, \frac{T - 52}{2}

Of the money remaining, John put 4/13 into checking account.

This means that he is left with 9/13 of \frac{T - 52}{2}.

We are told that this is equivalent to the last remaining $180 that John left to charity.

=> \frac{9}{13} *  \frac{T - 52}{2} = 108

Hence:

\frac{9(T - 52)}{13 * 2}  = 180\\\\9(T - 52) = 180 * 13 * 2\\\\9(T - 52) = 4680\\\\T - 52 = \frac{4680}{9} = 520\\\\

=> T = 520 + 52 = $572

Hence, John took $572 from his savings account. Since this is all he had in his savings account, John had $572 in his savings account.

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