Math Is Fun Forum

kappa_am

Member

Registered: 2013-12-20

Posts: 63

about equation writing

Hi,
it maybe silly question because my field is not math.
I have following set of equations:
1+0=*
*+*=*
1+*=1
1+1=1
0+0=0
0+*=0
could I able to write it in 3 line as follow or it is mathematically wrong? if it is wrong how can I write it in 3 line?
1+0 and *+*=*
1+* and 1+1=1
0+0 and 0+*=0

Thank you:)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,163

Re: about equation writing

hi kappa_am

Welcome to the forum.

When you have several expressions that are equal, it is better to write as a string of 'equals' rather than with AND,

eg

1+0  =  *+*  =  *

Is that what you wanted to know?

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

kappa_am

Member

Registered: 2013-12-20

Posts: 63

Re: about equation writing

Thank you
However, for example, 1+0 and *+* result same value but they are not logically equal.
1, 0 , * indicate state of a something ( capacitor voltage in my study), therefore I cannot say 1+0 equals *+*.
is there another way?
thank you

Bob

Administrator

Registered: 2010-06-20

Posts: 10,163

Re: about equation writing

I was assuming that all the 'elements' were of the same kind and that + meant the same throughout.

However if I introduce some units thus:

a miles plus b miles = c miles

and

d ohms plus e ohms = c ohms

then it would not be correct to write

a + b = d + e = c

But then it would not be correct to say

a + b AND d + e = c ,  either,  because c is not the same in the two cases.

I don't think you can combine your six lines into 3.

Perhaps you should give all the details first; then ask the question again.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob