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Question -

The cost of ball pen is ₹5 less than half of the cost of fountain pen. Write this statement as a linear equation in two variables.



Answer -

Let cost of a fountain pen = ₹x
and cost of ball pen = ₹y
∴ According to the condition,
y =-5
⇒  2y = x – 10
⇒  x – 2y – 10 = 0

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