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Mathematics, 24.01.2020 22:31 bombo99
600 units of electricity and 100 units of gas were used for a total cost of $388. next month, 400 units of electricity and 150 units of gas were used for a total cost of $277. find the cost per unit of gas.
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600 units of electricity and 100 units of gas were used for a total cost of $388. next month, 400 un...
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