Algebra calculations

machopicho

Well-known Member
Joined
Feb 28, 2010
Messages
606
Hello forum ...
Who you tell me how do I play an algebra with excel like this:
10
20100717121630pimenojpg.jpg
3
Attention, is not that simple ... I need this type of calculation to determine a useful range of a comparison of this kind in more than one formula:
10
20100717121630pimenojpg.jpg
3 <15 <20
20100717121630pimenojpg.jpg
3 = true

Thanks everyone!
 

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tusharm

MrExcel MVP
Joined
May 28, 2002
Messages
11,029
When the +/- is on the LHS of a less-than comparison , you don't need to test the minus part since m - n is always < m + n (when n is a positive number). So, you can just use m + n.

Similarly, when the +/- is on the RHS of a less-than comparison, you only need to use m - n.

Put together the final result with Excel's AND() function.
 

machopicho

Well-known Member
Joined
Feb 28, 2010
Messages
606
Yes, your reasoning is a good and i know it too, but I need this calculation to test a range:

10 +/-3 < 24

13< 24
7 < 24

13 - 7 = 6

6 is 25% of 24

this variation is accettable for me... if was 27% is not more accettable.
There is a way to calculate 10 +/- 3 in excel?
Thanks
 

tusharm

MrExcel MVP
Joined
May 28, 2002
Messages
11,029
The range covered by m +/- n is always 2*n.

Yes, your reasoning is a good and i know it too, but I need this calculation to test a range:

10 +/-3 < 24

13< 24
7 < 24

13 - 7 = 6

6 is 25% of 24

this variation is accettable for me... if was 27% is not more accettable.
There is a way to calculate 10 +/- 3 in excel?
Thanks
 
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