Question

The cost of a pencil is 3rupees and a ball point pen is 20 rupees . Ravi paid 150 rupees for the pencils and pens he purchased . Express the information as a linear equt

Answer 1

let the no. of pencil be x
and pens be y
so equation will be 3x + 20y = 150

Answer 2

Cost of pencil = Rs.3
Cost of ball point pen = Rs.20
No: of pencils = x
No: of ball point pens = y
Therefore the equation is, 3x + 20y = 150.