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Tom has a collection of 30 CDs and Nita has a collection of 18 CDs. Tom is adding 1 CD a month to hiscollection while Nita is adding 5 CDs a month a to her collection. Find the number of months after which they will have the same number of CDs. (Solve Algebraically)

 Feb 12, 2021
 #1
avatar+120127 
+1

30  +  1M  =  18  +  5M

 

30 -  18 = 5M   - 1M

 

12  =  4M

 

M =  12/4  =   3   months

 

 

cool cool cool

 Feb 12, 2021
 #2
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+1

DIFFERENCE = 12 CDs

   difference per month 5-1 = 4 CD/mo

12 CDs/ 4 CDs/mo = 3 months

 Feb 12, 2021

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