Question

The cost of 2 t.v. sets and a radio is rs. 7000, while 2 radios and one t.v. set together cost rs. 4250. the cost of a t.v. set is:

Answer 1

let

cost of t.v set = x

cost of radio = y

2x+y=7000

x+2y=4250

by subtracting both equations

we get

x-y=2750

x=2750+y

x+2y=4250

2750 + y +2y = 4250

3y=1500

y=500

we know cost of a radio

2x+y=7000

2x+500=7000

2x=6500

x=3250

cost of a single t.v is 3250