Formulate a pair of linear equations in two variables for the given data “3 pens and 4 books
together cost Rs.50 whereas 5 pens and 3 books of same kind together cost Rs. 54”.
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Explanation:
Let the number of pens be x.
Similarly let the number of books be y.
Statement 1: 3 pens and 4 books together cost Rs.50
=> 3x+4y=50. (Equation 1)
Statement 2: 5 pens and 3 books of same kind together cost Rs. 54
=> 5x+3y=54. (Equation 2)
Therefore the pair of linear equations will be:
3x+4y=50
5x+3y=54
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