SOLUTION: The cost of 4 notebooks and 5 pens is $20. The cost of 6 notebooks and 2 pens is $19. Which system of equations can be used to find the cost of a notebook "n" and the cost of a pen

Question 726300: The cost of 4 notebooks and 5 pens is $20. The cost of 6 notebooks and 2 pens is $19. Which system of equations can be used to find the cost of a notebook "n" and the cost of a pen "p".
A)
5n + 4p = 20 and 2n + 6p = 19
B)
4n + 5p = 20 and 6n + 2p = 19
C)
4n + 5p = 20 and 2n + 6p = 19
D)
5n + 4p = 20 and 6n + 2p =19
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

The cost of notebooks and pens is $.
if the cost of a notebook "" and the cost of a pen "", than you have
.....eq.1

and, if he cost of notebooks and pens is $, than you have
.....eq.2
so, system of equations can be used to find the cost of a notebook "n" and the cost of a pen "p" is:
.....eq.1
.....eq.2
______________________________
so, your answer is
B)
and

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