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16 December, 08:41

For 8 days of very hot weather, the water level in a lake dropped 3 inches per day. on the ninth day, storms raised the level 6 inches. Write and find the value of an expression for the change in the water level of the lake during these 9 days.

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  1. 16 December, 10:14
    The water level dropped 18 inches
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