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March 16th, 2016, 03:38 PM   #1
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Not sure how to write the formula.

Twice the difference of a number and four is four. Find the number.


I was thinking 2(-x+4)=4


but of course it's wrong.
GIjoefan1976 is offline  
 
March 16th, 2016, 04:04 PM   #2
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The difference between the number and four is two, so the number is either two or six.
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March 16th, 2016, 04:57 PM   #3
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Quote:
Originally Posted by skipjack View Post
The difference between the number and four is two, so the number is either two or six.
Thanks it says it is 6 I believe, just not sure how I would write the formula to be able to find that it is 6. thanks for your reply.
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March 16th, 2016, 07:01 PM   #4
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Quote:
Originally Posted by GIjoefan1976 View Post
Thanks it says it is 6 I believe, just not sure how I would write the formula to be able to find that it is 6. thanks for your reply.
2 (x – 4) = 4
x = 6
I agree with skipjack that number is either 2 or 6, but subtraction is always order–sensitive, and the question says that difference of a number and four is four, so the number has to be 6.
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