Two pen

Two pens and one notebook costs $56. One pen costs 1/5 of one notebook. How much is the one notebook?

Correct answer:

n =  40

Step-by-step explanation:


2p+n = 56
p = n/5

2·p+n = 56
p = n/5

n+2p = 56
n-5p = 0

Row 2 - Row 1 → Row 2
n+2p = 56
-7p = -56


p = -56/-7 = 8
n = 56-2p = 56-2 · 8 = 40

n = 40
p = 8

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Showing 1 comment:
Kaitlin
I need help but this place did not help





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