Answer:
The cost of a pencil and a notebook together is $3
Step-by-step 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
[tex]2x+5y+4z=24[/tex] ----> equation A
[tex]4x+2y+3z=17[/tex] ----> equation B
[tex]3x+3y+2z=15[/tex] ----> 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
