SOLUTION: A book costs twice a pen. The pen and the book together cost Rs.48. What is the cost of each item? Form an equation and solve.

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Question 379625: A book costs twice a pen. The pen and the book together cost Rs.48. What is the cost of each item? Form an equation and solve.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let B be the cost of the book, P the cost of the pen.
1.B=2P
2.P%2BB=48
Substitute using eq. 1,
P%2B2P=48
3P=48
highlight%28P=16%29
Then from eq. 1,
B=2%2816%29
highlight%28B=32%29