paupauyes paupauyes
  • 01-03-2018
  • Mathematics
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A number is 1/7 of another number. The difference of the number is 18. Find the number.i

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MrBalduzzi
MrBalduzzi MrBalduzzi
  • 01-03-2018
The answer is the number is 3 and the other number is 21. You can set the problem up as two equations. First, x = 1/7y as "a number (x) of 1/7 of another number (y)." Then the difference of the number is 18 is "y - x = 18" because y is the larger of the two numbers from the first equation. You could then substitute 1/7y for x in the second equation and solve for y, which is 21. You can then solve for x, the number, or 3. 
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