SOLUTION: Sam paid $70 for 4 similar pens and 2 notebooks. A notebook cost $5 more than a pen. What was the cost of one notebook ?

SOLUTION: Sam paid $70 for 4 similar pens and 2 notebooks. A notebook cost $5 more than a pen. What was the cost of one notebook ?

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Question 1025438: Sam paid $70 for 4 similar pens and 2 notebooks. A notebook cost $5 more than a pen. What was the cost of one notebook ?
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
4P+2N=70
N=P+5
4P+2(P+5)=70 substitute P+5 for N in 1st equation)
4P+2P+10=70
6P=60
P=10
N=15
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