Question

The cost of 3 notebooks and 5 pens is Rs 460. If the notebooks cost is Rs 20 more

than the pen. Find the cost of a notebook and a pen.​

Answer 1

Answer:

Pen=50

Notebook=70

Step-by-step explanation:

Suppose the cost of Notebook=x and that of pen=y

We can say from the ques that

3x+5y=460

and

x=y+20

So substituting x in first equation

3y+60+5y=460

8y=460-60

y=400/8

y=50

and

x=70

Answer 2

Step-by-step explanation:

Let price of pen be x and note book be y

Here,

2x + 3 y = 40 —-(1)

2x + 5 y = 60—-(2)

Subtract (1) from (2),

We get 2y = 20;

y=10 which is the cost of a note book.

Substitute the value of y in (1)

2x +30= 40; 2x = 10;

X =. 5 which is the cost of pen

Cost of pen is Rs. 5 and note book is Rs.10