Two mixers and one T.V. cost Rs7000, while two T.V.s and a mixer cost Rs9800. The value of one T.V. is:
Rs 2800
Rs 6200
Rs 4200
Rs 8400
Rs 2100
2M + T = 7000 ............a
M + 2T = 9800 ............b
By solving a and b TV cost T = 4200