Question

The price of a book is 4 times the price of a pen. It costs 48 to buy two books and three pens. With the money to buy a book ,You can buy 3 pencils

1) Take the price of a book as x and the value of a pen as y and make a pair of concurrent equations containing x and y.


plz help...will give the brainliest​

Answer 1

Answer:

1) x=4y

2x +3y =48

Step-by-step explanation:

price of book is 4 times of pen

x= 4y -----(1)

2 books and 3 pens= 48

2x +3y= 48 -----(2)

To solve equations:

susbt. (1) into (2):

2(4y) +3y =48

8y +3y= 48

11y= 48

y= 48 ÷11

y= 4.3636 (5 s.f.)

y= 4.36 (2 d.p.)

Subst. y= 4.3636 into (1):

x= 4(4.3636)

x= 17.45 (2 d.p.)