Of an equation too, not an expression well u know...
2006-10-28 16:47:55 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Then could I take it mathmeticians don't make the best writers, hence whoever called 'subtraction principle of equality' doesn't really know how to write logically?
2006-10-28 16:55:10 · update #1
and for reals, extra points for whoever could answer whether multiplication principle of equality is really just division
2006-10-28 16:56:51 · update #2
isn't it pathetic kinda? I mean i've never had a linear equation in my life that required me to add something to both sides (unless it was changing the subtraction sign cus I was minusing a minus sign) in my wholeeee life. Our children are being confused for no reason, who's with me!
2006-10-28 17:32:08 · update #3
I found a site that easily explains what you seek.
Go to:
http://www.jamesbrennan.org/algebra/intro%20to%20algebra/addition_principle.htm
Guido
2006-10-28 16:53:53 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Here goes. The addition Property of equality states that you can add the same thing to both sides of an equation and get an equivalent equation. That means you can add a positive number or add a negative number (and since addition can be rewritten as subraction and vica-versa the answer to your question is yes).
The Multiplicative Property of equality states that you can multiply both sides of an equation by the same thing and get an equivalent equation. Since you can multiple by a fraction, as in 1/2, then yes, you can think of it as division. All division expressions can be rewritten as multiplication (remember we don't divide, we multiply by the reciprocal?) and visa-versa.
Hope I've helped.
2006-10-29 00:04:29 · answer #2 · answered by mom 7 · 0⤊ 0⤋
that is the definition. If you take a positive # to the other side of the equation you have to change # to a negative to keep the equation correct. same with an expression. you could say add the the number to the other side and change it a negative form, but why?
2006-10-29 00:02:39 · answer #3 · answered by cowboybabeeup 4 · 0⤊ 0⤋
No even adding to both sides is not correct to equate . Only multiplying and dividing on both is correct
2006-10-28 23:54:56 · answer #4 · answered by Chanti® 3 · 0⤊ 0⤋
What do you mean with
" a number on one side from both sides? "
Do you mean subtracting the same number from both sides ?
inthat case yes.
2006-10-29 00:01:49 · answer #5 · answered by gjmb1960 7 · 0⤊ 0⤋
They all just mean that you must do the same thing to both sides of the equation.
a=b
a+c=b+c
a-c= b- c
a(c)=b (c)
a/c= b / c
2006-10-29 00:28:06 · answer #6 · answered by Need2Know 1 · 0⤊ 0⤋
yes, you got it right
2006-10-28 23:51:58 · answer #7 · answered by locuaz 7 · 1⤊ 1⤋