Question

Three bags and four pens together cost Rs. 257, whereas 4 bags
and 3 pens together cost Rs. 324. Find the cost of 2 bag and 3 pens.​

Answer 1

Answer:

Let the cost of 1 bag =x

And the cost of 1 pen =y

⇒3x+4y=257

⇒4x+3y=324

Equation (1) × 4 : 12x+16y=257×4

Equation (2) × 3 : 12x+9y=324×3

Subtract two equations ;

⇒7y=56

⇒y=8

⇒x=75

⇒total cost of 1 bag and 10 pens=x+10y=75+80=155