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Bob has $150 in his savings account and saves $40 a month. Andrea has only $100 in her account but saves at a rate of $50 a month. When will Andrea have saved more than Bob?
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Bob has $150 in his savings account and saves $40 a month. Andrea has only $100 in her account but saves at a rate of $50 a month. When will Andrea have saved more than Bob?
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Mar 21, 2016
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Bob has $150 in his savings account and saves $40 a month. Andrea has only $100 in her account but saves at a rate of $50 a month. When will Andrea have saved more than Bob?
Mathematics
high-school
Shriike
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x = number of months
Bob = 150 + 40x
Andrea = 100 + 50x
100 + 50x > 150 + 40x
50x > 50 + 40x
10x > 50
x > 5
So starting month 6, Andrea will have saved more than Bob.
Frank Eno
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Mar 25, 2016
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Frank Eno
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