Question discussion

The cost of 5 pars and 8 pencils is 31. What would be the cost of 15 pens and 24 pencils ?

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Discussion 1

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Solution
let the cost pencil be p Rs per pencil and cost of pars be a Rs per par
given that , 5a + 8p = 31
To find : 15a + 24p
= 3(5a + 8p)
=3 x 31
= 93