The price of a notebook is 30% higher than the price of a pen.
If together a notebook and a pen cost 18.4 $:
How much is the notebook and how much is the pen?
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The price of a notebook is 30% higher than the price of a pen.
If together a notebook and a pen cost 18.4 $:
How much is the notebook and how much is the pen?
To find the individual prices of the notebook and pen:
Define the price of the pen as $.
The notebook price, therefore, will be $because it is 30% higher.
Form the equation based on the total cost:
Equation:
Combine like terms to simplify:
To find , divide both sides by 2.3:
Calculate :
Thus, the price of the pen is 8$. Now calculate the price of the notebook:
The price of the notebook is 10.4$.
Therefore, the solution to the problem is: Notebook 10.4$, pen 8$.
Notebook 10.4 $, pen 8 $
Calculate 15% of 100:
Because 30% more means 100% of the original price PLUS 30% more. So 100% + 30% = 130% = 1.3 times the original price. Writing x + 0.3 would only add 30 cents!
Always let x represent the smaller or simpler value. Since the notebook costs more than the pen, let the pen = x. This makes the math easier!
Decimal answers are completely normal in word problems! Just make sure to include the dollar sign and check that your decimals add up to the total cost given.
You could try, but algebra is much faster and more reliable. Setting up the equation gives you the exact answer in just a few steps!
Because both terms have the same variable x! Think of it like: 1 apple + 1.3 apples = 2.3 apples. We're adding .
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