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.
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.
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Let us assume the cost of the ball pen be Rs. and that of a fountain pen to be . then according to given statements
We have
x = y/2 -5
2x = y -10
2x -y +10 = 0
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Let the cost of one fountain pen be Rs. ‘x’ and the cost of one ball pen is Rs. ‘y’
Given,
Cost of ball pen is Rs. 5 less than half of the cost of fountain pen.
⇒ y = (\(\frac{x}{2}\)) – 5
⇒ 2y = x – 10
⇒ x – 2y – 10 = 0
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