Question

(please answer to the question )
9 pens and 5 pencils cost 154, and 13 pens and 7 pencils cost 222. What is the cost of one pen and one pencil separately? explain ( ans=pen 16 , pencil= 2)​

Answer 1

Answer:

pen=16

pencil=2

Step-by-step explanation:

let pens be x and pencils be y

9x+5y=154

13x+7y=222

7(9x+5y)=7x154

5(13x+7y)=5x222

subtracting 2-1

65x+35-63x-35y=1110-1078

2x=32

x=16

9x+5y=154

16 x 9+ 5y=154

5y=154-144

5y=10

y=2

pen=16

pencil=2