Mr. Rao buus a computer, a printer and a scanner for $2543. The computer costs $1502 more than the printer. The printer costs $123 more than the scanner. How much does Mrs. Rao pay for the computer?
1) total $ = 2543 2) x -> printer y-> computer z -> scanner 3) y = x + 1502 4) x = z + 123 -> x - 123 = z 5) 2543 = (x + 1502) + (x - 123) + x 6) 2543 = x + 1502 + x - 123 + x 7) 2543 = 3x + 1379 8) 2543 - 1379 = 3x 9) x = 388$ 10) y = x + 1502 11) y = 1890$
