SOLUTION: Joel has twice as many CDs as Mariella has. Subtracting 7 from the number of CD's Joel has and dividing by 3 equals the number of CDs blake has. If Blake has 25 CDs how many CDs do

Question 869180: Joel has twice as many CDs as Mariella has. Subtracting 7 from the number of CD's Joel has and dividing by 3 equals the number of CDs blake has. If Blake has 25 CDs how many CDs does Mariella have?
Answer by XilliX(3) (Show Source): You can put this solution on YOUR website!
We can write each of the statements as an equation
1. Joel has twice the number of CDs as Mariella , hence

2. Joel's number of CD's - 7 divided by 3 equals the number of CDs Blake has:

3. Blake has 25 CDs

Substituting (3) into (2) gives:

So Joel has got 82 CD's

Based on equation (1) we can calculate the number of CD's Mariella has:

Mariella has 41 CDs
Joel has 82 CDs
Blake has 25 CDs
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