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25 March, 07:25

A city water tank holds 20 gallons of water. A technician empties 25% of the tank. How many more gallons of water must be removed from the tank so that it has 2/5 of the water that it started with?

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  1. 25 March, 08:52
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    20

    empties 25%

    25%=1/4

    1/4 of 20 is 5

    20-5=15

    15 left

    how much more must be removes so it reaches 2/5 of 20

    2/5 of 20=40/5=8

    15-what=8

    minus 15 both sides

    -what=-7

    multipy-1

    what=7

    answer is 7 more gallons must be removed
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