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April 1, 2015

April 1, 2015

Posted by **Donna** on Saturday, August 23, 2008 at 4:56pm.

$ 177= 11 Books 12 Pens

Cost of b=

P=

- Math -
**drwls**, Saturday, August 23, 2008 at 5:04pm3 p + 3b = 45

11 b + 12 p = 177

12 b + 12 p = 180

Subtract the second equation from the third.

b = 3.

9 + 12 p = 177

12 p = 168

p = ?

- Math -
**drwls**, Saturday, August 23, 2008 at 7:58pmI made a mistake near the end.

3p + 9 = 45

3p = 36

p = 12

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