Two mixers and one TV cost ₹500, while two TVs and one mixer cost ₹700. The cost of one TV is:

₹300

Cost of

2TV + 1Mixture = 700

2Mixture + 1TV = 500

Make quantity of mixture same by multiplying both the equations by 2 and 1 respectively

4TV + 2Mixture = 1400

2Mixture + 1TV = 500

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3TV = 900

1TV = 300