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24 May, 15:40

25 decreased by one fifth of a number is 18 find the number

+5
Answers (2)
  1. 24 May, 16:18
    0
    25 - (1/5) x = 18

    Subtract 25 from both sides:

    25 - (1/5) x - 25 = 18-25

    (-1/5) x = - 7

    Multiply both sides by - 5:

    -5 (-1/5) x = - 5 (-7)

    x = 35

    Answer: 35
  2. 24 May, 18:48
    0
    Well first find the difference between 18 and 25 which is 7. This tells us that seven is one fifth of a number. 7 times 5 is 35 which is your answer.
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