Question

2 chairs 1 table cost 320 while 1 chair and 2 table cost 640 what is the cost of each chair and table

Answer 1

let the cost price of table be X
&
let the cost price of chair be y
then
x+2y = 320...........(1)
2x+y = 640...........(2)

now
multiply in equation (1) by 2 & equation (2) by1
thus

2x+4y = 640
2x +y = 640

3y = 0
y = 0

X+2×0 = 320
X= 320

Answer 2

Table = ₹320
Chair = ₹0 ( Free)