Question

3 pens and 2 pencils together cost Rs.32 .and 9 pens and 3 pencils cost Rs93 . find the cost of 2 pen and 2 pencil. 2.

Answer 1

Answer:

cost of 2 pens=2×10 =20rs

cost of 2 pencils =2×1=2rs

Step-by-step explanation:

let the cost of pen be x

and the cost of pencil be y

then according to the question,

3x+2y=32. -(I)

also,

9x + 3y= 93 -(2)

multiplying (1) by 3

9x +6y=96 -(3)

subtracting (2) from (3)

we get,

3y= 3

y=1

putting value of y in (1)

3x + 2(1)=32

3x = 30

x=10