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Mathematics, 03.11.2019 06:31 xcoder1732
During one month, a homeowner use 600 units of electricity and 100 units of gas for total cost of $412. the next month, 400 units of electricity and 150 units of gas for used for total cost of $293. find the cost per unit of gas
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During one month, a homeowner use 600 units of electricity and 100 units of gas for total cost of $4...
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