# math

posted by alisha

John and Paul work together at a music store. In one afternoon, they sold a total of 41
CDs. If Paul sold 9 more CDs than John, how many CDs did John sell?

1. MathMate

Math:
If we take away 9 CDs, then they sold equal quantities, namely (41-9)/2=16 each.
So John sold 16, and Paul sold 16+9=25 CDs.

Algebra:
Let x=number of CD's sold by John, then Paul sold x+9.
Equate total:
x+x+9=41
2x=41-9
2x=32
x=16 (John)
x+9=25 (Paul)

2. alisha

thank you

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