Question

5 pencils and 7 pens together cost < 250 whereas 7 pencils and 5 pens

together cost < 302. Find the cost of one pencil and that of a pen.​

Answer 1

Step-by-step explanation:

let x be the no. of pencils

and y be the no. of pens

5x+7y=250 ---------1

7x+5y=302 ----------2

solve both the equation

multiply equation 1 with 7

multiply equation 2 with 5

24y=240

y=10

substitute y=10 in equation 1

so, x=36

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