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# solve

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If I give my brother 5 dollars, then we will have the same amount of money. If instead he gives me 25 dollars, then I'll have twice as much money as he will have. How much money does my brother currently have (in dollars)?

Jun 28, 2023

#3
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If I give my brother 5 dollars, then we will have the same amount of money. If instead he gives me 25 dollars, then I'll have twice as much money as he will have. How much money does my brother currently have (in dollars)?

Let M stand for My original amount

Let B stand for Brother's original amount

(M – 5)  =  (B + 5)

(M + 25)  =  (2)(B – 25)

M – 5  =  B + 5   gives us  M = B + 10    (1)

M + 25  =  2B – 50                                 (2)

Substitute the value of M from (1)

into the equation (2)                             B + 10 + 25  =  2B – 50

Combine like terms                                          85  =  B

Brother has 85 dollars before they start giving each other money.

The problem doesn't ask for My original amount but it's B + 10 = 95