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Twice a number decreased by 9 is greater than 11 what is the number?
Wiki User
∙ 14y ago
IF the question means: What number, multiplied by 2, and reducing the answer by 9, gives a result that is greater than 11?
ANSWER: Any number greater than 10.
Let's try 11.
2 x 11 = 22.
22 - 9 = 13, which is greater than 11.
But if we try 10 ...
2 x 10 = 20.
20 - 9 = 11, but 11 is not greater than 11! So we need a higher number than 10.
Try it for yourself with ANY number greater than 10!
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Alternative answer.
If the question means "What number decreased by 9, and then doubled, produces a number greater than 11?"...
... then work it out this way, working backwards:
What number is greater than 11?
We could say '12' is greater than 11.
Half of 12 is 6. Add 9 to 6 = 15.
So, now, let's try 15.
15 decreased by 9 is 6.
Twice that number is .... 12 (2 x 6), which is greater than 11!
But this would work for ANY number from 15 upwards!
Wiki User
∙ 14y ago
Isaiah Wolf
If you are writing it out, it should be n(number), which is n^2-9>11
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