Question

solve (5x + 7y =79) and (7x + 5y =77) plz give step by step process​

Answer 1

Answer:

Do you want give reason answer

Answer 2

Step-by-step explanation:

let the price of one book be x

and the price of one pen be y

so the equations are

5x+7y=79

7x+5y=77

let us solve these equations

35x+49y=553

35x+25y=385

24y=168

y=168/24=7

So the price of one pen and one book are 7,6

the cost of one book and two pens are 6,14 repectively