# Equation in 2 variables

• March 17th 2010, 06:02 AM
Mascara
Equation in 2 variables
Hello everyone!

I have this equation in two variables

y = A/x+b

I would like to find all the values for x and y that satisfy the equation.
I can't remember the correct procedure, can u help me?

Thanks!
• March 17th 2010, 06:41 AM
NewtoMath
I'm probably wrong in this but I suppose y = any real number and x= all real numbers excluding zero? since a fraction can never have a zero.
• March 17th 2010, 07:00 AM
gregmosu
Quote:

Originally Posted by NewtoMath
I'm probably wrong in this but I suppose y = any real number and x= all real numbers excluding zero? since a fraction can never have a zero.

Actually, x+b can't equal zero. So, set x+b equal to zero and solve for x. After doing that, you'll see that x can't equal -b.
• March 17th 2010, 07:18 AM
skeeter
Quote:

Originally Posted by Mascara
Hello everyone!

I have this equation in two variables

y = A/x+b

I would like to find all the values for x and y that satisfy the equation.
I can't remember the correct procedure, can u help me?

Thanks!

if the equation is as you posted it ...

$y = \frac{A}{x} + b$

... then first note that x cannot be 0.

substitute any other value of x and determine the corresponding value of y.

also, note that there are an infinite number of ordered pairs (x,y) that satisfy this equation.

to get specific solution(s), you'll need a second equation that relates x and y.