5 pencils and 4 erasers cost Rs 13 whereas 9 pencils and 5 erasers cost Rs 19 Then the price of 6 pencils and 3 erasers is ?->(Show Answer!)

1. 5 pencils and 4 erasers cost Rs 13 whereas 9 pencils and 5 erasers cost Rs 19 Then the price of 6 pencils and 3 erasers is

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By: anil on 05 May 2019 02.41 am

5p + 4e = 13 9p + 5e = 19 solving for p, we get p = 1 e = 2 So, 6 pencils and 3 erasers cost 6 x 1 + 3 x 2 = 12

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