Question

The cost of 2 pen and 3 pencil is 9 rupee and cost of 4 pen and 6 pencil is 18. Find the cost of each pen ans pencil.(by substitution method)

Answer 1

Step-by-step explanation:

let the cost of pen = x

and cost of pencil = y

A.T.Q

2x + 3y = 9 ---------------(1)

4x + 6y = 18

divide by 2

2x + 3y = 9 --------------(2)

may be this eq has no solution because eq 1 and eq 2 are same and

a1/a2 = b1/b2 = c1/c2