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#1 2006-06-15 05:18:47

helpperson
Guest

Algebra

Can you tell me how you work this equation please

2x+3=1                  3x+5=2

#2 2006-06-15 06:46:36

Patrick
Real Member
Registered: 2006-02-24
Posts: 1,005

Re: Algebra

Try to read this: http://www.mathsisfun.com/algebra/introduction.html


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#3 2006-06-15 15:42:02

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,562

Re: Algebra

2x+3=1
double a number called x and add 3 and you get 1
double # add 3 and get 1
What is double # ????
3 less than 1
Yes, nice thinking.
So double # is 1 take away 3.
Yes, what is 1 take away 3 ??
Count backwards... 1 0 -1 -2
-2
So double # is -2
What times 2 is -2 ??
Hmmm...
Half of -2 ???
Yes, excellent thinking!!!
What is half of -2 ????
Well if you owe me 2 dollars, then I owe you negative two dollars.
Half of that is one dollar I guess!!
Maybe it is -1 ??
Yes you are right.
The number is -1, most people would agree who study algebra.


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