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Question -

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



Answer -

Let the cost of a fountain pen be y and cost of a ball pen be x.
According to the given statement,
x = y/2 − 5
or 2x = y – 10
or 2x – y + 10 = 0
Which is required linear equation.

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