Question

5 pencil +7 pen =25

7pencil+5pen=23

find the cost of one pencil and one pen

Answer 1

Step-by-step explanation:

let cost of one pencil be x

cost of one pen be y

5x +7y=25

+

7x+5y =23

____________

12x+12y=48

12(x+y). =48

x+y=4

ans:4

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Answer 2

Step-by-step explanation:

cost of one pencil:1.5rs

cost of one pen :2.5rs

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