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goldenfox [79]
3 years ago
14

Suppose you have $28.00 in your bank account and start saving $18.25 every week. Your friend has $161.00 in his account and is w

ithdrawing $15 every week. When will your account balance be the same?
Mathematics
1 answer:
Mademuasel [1]3 years ago
3 0
28 + 18.25x = 161 -15x (here, x stands for every week this addition or withdrawal happens)

So:
28+18.25x = 161 - 15x
18.25x = 161 - 28 - 15x
18.25x = 133 - 15x
18.25x + 15x = 133
33.25x = 133
x = 133/33.25
x = 4

So, they will have the same balance in 4 weeks. 
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