uses 200 watts of electricity in the first month of buying her new home. In the second month she used ‘x’ additional watts. The first 15 watts were calculated at $20 and the remainder as $15 for every 5 watts that she used. Her total cost was $150. How many watts did she use for both months?
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uses 200 watts of electricity in the first month of buying her new home. In the second month she used ‘x’ additional watts. The first 15 watts were calculated at $20 and the remainder as $15 for every 5 watts that she used. Her total cost was $150. How many watts did she use for both months?
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