# Logic

##### Full Member
HEY Ryan, if 3 + 2 = 5, then 2 + 3 = ?
Hi , is that relevant to my question tho?

5

#### Denis

##### Senior Member
Thing is, we never know what YOUR questions are!

##### Full Member
Hi guys, may please anyone in its explanation explain to me what does "the same" means in math?
I mean, once we have two things are equal, x=y for example, then we say that x is the same as y or vice versa, what's confusing me what do we intend once we said "the same" ? I know it's simple logic but if my simple logic sucks, then I can't complete learning, and by you guys I believe that I will close those gaps.

I define the same is: two things the same regardless to its cosmetics, I mean regardless to what we call the variables, if they are referring to the same object then they are the "same" .. is this a good enough explanation to define what same is?

##### Full Member
Hi guys! once again I'm sorry for posting like those question, but I really not succeeding solving those gaps by myself and thanks alot.

My problem is like this, lets assume that's x=y=z , then we conclude x=z ! it's really fine but it's a conclusion and not given data.
so now if I do z+m= 5, can I assign instead of z, x? I mean to write x+m=5 ?! what's confusing me because we conclude that x=z but it's not given information, given x=y=z, and from this we conclude x=z so I'm asking can I depend also on my implicitly conclusion of the given data(x=y=z) ?! thanks alot !

##### Full Member
Hi guys, I'm really struggling something which I couldn't find a solution for it!
I always going to negatively what result I get.
I mean, lets assume I get from equation logic that x=2y.
so " I " can assume x != 2y (not equal) .. why not? while the logic is giving me opportunity to do whatever things in general why not claiming that assumption?! I can think in general and one of possibilities of general is x != 2y .. so it's possible !

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#### JeffM

##### Elite Member
Yes, you may make up any mathematics you want.

$$\displaystyle 6 = 2 * 3 \implies 6 \ne 2 * 3.$$

#### tkhunny

##### Moderator
Staff member
3 = 5 - False
4 = 4 - True
x = 2y - Conditionally True. One must pick x and y that work.

#### Otis

##### Senior Member
… I always going to negatively what result I get …
I don't understand what you mean.

Please post the complete exercise statement.