Question

tolong di jawab mau di kumpul hari ini
dengan cara y​

Answer 1

books = x

pen = y

3x +  y  = 17  |x5| 15x + 5y = 85

4x + 5y = 30 |x1| 4x  + 5y = 30   _

                                    11x = 55

                                       x = 5

3x + y = 17

3(5) + y = 17

15 + y = 17

y = 17 - 15

y = 2

So, the price of a book is $5 and the price of a pen is $2.