Question

Doua creioane,5 caiete si 4 pixuri sunt in total 24.4 creioane , 2 caiete si 3 pixuri sunt 17.3 creioane,3 caiete si 2 pixuri costa 15.Cat costa impreuna un creion un pix si un caiet

Answer 1

The cost of a pencil and a notebook together is $3

Explanation:

The question in English is

Two pencils, 5 notebooks and 4 pens total 24.4 pencils, 2 notebooks and 3 pens are 17.3 pencils, 3 notebooks and 2 pens cost 15. How much does a pencil and a notebook cost together?

Let

x ----> the cost of one pencil

y ----> the cost of one notebook

z ----> the cost of one pen

we know that

`2x+5y+4z=24` ----> equation A

`4x+2y+3z=17` ----> equation B

`3x+3y+2z=15` ----> equation C

Using a Mathematical's tool (3 Equation System Solver)

The solution is

x=1,y=2,z=3

see the attached figure

so

The cost of one pencil is $1

The cost of one notebook is $2

The cost of one pen is $3

therefore

The cost of a pencil and a notebook together is

($1+$2)=$3