Question 467431
A salesperson works in the TV ans stereo department of an electronics store. One day she sold 3 TV's and 4 Stereos for $2530. The next day, she sold 4 TVs and 3 stereos $2510. Assuming they are all the same TV's and stereos hat is the price of each TV ans stereo?
..
let x=price of stereos
let y=price of TV's
..
3y+4x=2530
4y+3x=2510
..

12y+16x=4*2530  (1st eq.*4)
12y+9x=3*2510    (2nd eq.*3
subtract
7x=2590
x=2590/7=370
..
4y=2510-3x=2510-3*370=1400
y=1400/4=350
Ans:
Price of stereo=$370
Price of TV=$350