## Problem 4

An album costs as much as two books, and two books cost as much as three pens. If two pens, two books, and one album cost 128 lei, find the cost of an album, a book, and a pen.

Note

- Effective working time 2 hours.
- All subjects are mandatory.
- 7 points are awarded for each correctly solved problem.


## National Mathematics Olympiad  Local stage -14.02.2015  Grading scale  4th grade
## Problem 4

An album $=2$ books $=3$ pens $\qquad$ $1 p$

An album + 2 books + 3 pens $=128$ lei $\qquad$ $1 p$

We replace the album and books with pens and get 8 pens $=128$ lei 1 pen $=16$ lei, 1 album $=48$ lei, 1 book $=24$ lei $\qquad$ $1 p \times 3=3 p$