How is x - (-1) = 11 If we seed X-1=11 And we move -1 to another side with a different sign it will be x=11+1 So x =12

Question

How is x - (-1) = 11 If we seed X-1=11 And we move -1 to another side with a different sign it will be x=11+1 So x =12

Answer 1

Hello, Peter

What is your question? I am confused. I read what you wrote about 5 times already.

 If the original question is

x-(-1)= 11, then x= 10

I think this is where you are getting confused.

x-1= 11    IS NOT THE SAME AS x-(-1)= 11

 

You are right that x-1= 11 will give you x= 12.  But x-(-1)= 11 will give you x=10.  This is how.  When you subtract what you are really doing is adding the opposite.  For example, the opposite of 5 is -5 and the opposite of -2 is two.  So, let me use 5 and -2 to illustrate my point.  

a) 11-5  is the same as 11+(-5).  The answer of course is 6.

b) 11-(-2) is the same as 11+2, which is 13.

 

So, coming back to the question at hand, 

x-(-1)= 11 should be the same as x+1= 11. So, x=10

I hope this helps clarify any misconceptions you might have. Thanks for posting your question.  

D. Y. Taylor

dont forget to rate my answer :)

Answer 2

x -(-1) becomes x + 1, since (-(-1)) = +1

 

Therefore. x - (-1) = 11,  becomes x + 1 = 11.

 

Subtract 1 from each side, and we get x + 1 - 1 = 11 - 1.

 

So x = 10.

 

10 - (-1) = 10 + 1 = 11