David opens a bank account with $140 and then deposits $150 each month. Louis opens a bank account with $260 and deposits $120 each month.
How many months will it take for David and Louis to have equal amounts of money in their accounts?
A.
2
B.
4
C.
5
D.
7
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OpenStudy (anonymous):
@TheFlash17 plz help me
OpenStudy (anonymous):
Its 4
OpenStudy (anonymous):
but how
OpenStudy (anonymous):
x= number of months that it takes for David and Louis to have equal amounts of
money.
Then:
140+x*150=260+x*120 \\ 150x-120x=260-140 \\ 30x=120 \\ \boxed{\bold{x=4}}
Answer: it takes 4 months --> OPTION B
OpenStudy (anonymous):
ohhh... okay thank you so much
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