The total price for 4 notepads and 3 erasers is 14.5. If the price of each notepad is 3 times that of an eraser, find the price of notepad?

Method 1 :

Let n be the price of a notepad.
Then, price of an eraser = (1/3)n

The total price of 4 notepads and 3 erasers :
4*n + 3*(1/3)n = 14.5
5n = 14.5
n = 2.9

Hence, the price a notepad = 2.9


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Method 2 :

Let n be the price of a notepad, and e be the price of an eraser.

4n + 3e = 14.5 …… [1]
3e = n …… [2]

Substitute [2] into [1] :
4n + n = 14.5
n = 2.9

Hence, the price a notepad = 2.9

4n+3*n/3 = 14.5
n = $2.90

The total price for 4 notepads and 3 erasers is 14.5.
If the price of each notepad is 3 times that of an eraser,
find the price of notepad?
4n + 3e = 14.5
n = 3e
5n = 14.5
n = 2.9
The price of a notepad is 2.9.

Price of a notepad is 2.9

4n + 3e = 14•5
n = 3 e

6e = 14•5
n = 2•42_____price of notepad

Let 'n' be the price of a notepad
Let 'e' by the price of an eraser

The price of each notepad is 3 times that of an eraser
n = 3e, or
e = n/3

The total price for 4 notepads and 3 erasers is 14.5
4n + 3e = 14.5

Sub in 'e' from the previous equation:
4n + 3(n/3) = 14.5
5n = 14.5
n = 2.9

Therefore, the price of a notepad is $2.9

Extra:
e = 2.9/3
e = 0.97 or 29/30
So the price of an eraser is 0.97