Question

3. The cost of 2 pens and 2 pencils is Rs.30
and the cost of 3 pens and 5 pencils is Rs.55.
Find the cost of one pen and one pencil.​

Answer 1

Answer:

x=pen,y= pencil

Step-by-step explanation:

2x+2y=30

3x+5y=55

solve it you will get the answer

Answer 2

Answer:

let cost of pen be x

let cost of pencil be y

A/q

2x+2y = 30

x+y= 15

x = 15 - y

also

3x +5y = 55

3(15 - y ) + 5y = 55

45 - 3y + 5y = 55

2y = 10

y = 5

cost of one pencil is 5

since x=15-y

= 15 - 5

=10