The cost of 24 notebooks is 72.
What is unitary method?
The method in which first we find the value of one unit and then the value of the required number of units is known as the Unitary Method.
According to the given question.
Cost of 3x notebooks is x.
⇒ Cost of one book =\(\frac{3x}{x} =3\)
Therefore,
The cost of 24 notebooks = \(3 \times 24 = 72\)
Hence, the cost of 24 notebooks is 72.
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