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1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. (Take the cost of a notebook to be Rs x and that of a pen to be Rs y).
Answers (1)
Let the cost of a notebook be Rs x and that of a pen be Rs y.
According to the given condition: The cost of a notebook is twice the cost of a pen.
Thus,
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