Question

5 pencils and 7 pens together cost 50 whereas 7 pencils and 5 pens together cost 46 find rhe cost oof one pencil and one pen and find thir solutions graphically​

Answer 1

Step-by-step explanation:

let pens be X and pencils y

5y + 7x = 50. 1

7y + 5x = 46 2

thus multiplying first equation by 7 and second equation by 5, we will get,

49x + 35y= 350. 3

25x+35y=230. 4

thus subtracting equation 4 from EQ 3

24x=120

thus cost of one pen is 5

cost of one pencil is 3