Question

The cost of a pen is ruppes 4 less than 4 times the cost of a pencil. The cost of 3 pencils and 5 pens is ruppes 118. what is the cost of 1 pencil and 1 pen?​

Answer 1

Step-by-step explanation:

let cost of pencil = x.

therefore cost of pen = 4x-4

also 3x + 5× (4x-4) = 118

3x +20x - 20 = 118

23x -20= 118

23x= 118 + 20 = 138

x = 138/23

cost of 1 pencil = 6

therefore

cost of 1 pen = 4x-4

= 6×4-4

= 24-4

= 20

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