Solve for Y

[Guest]

If x = (y + a) /( y - a), then y = ?

x / 1 = y + a / y - a : Cross multiply.

xy - xa = y + a.

Not sure if correct steps and how to continue.

[Guest]

x=[tex]\frac{y+a}{y-a}[/tex]

y=?

[tex]\frac{x}{1}[/tex]=[tex]\frac{y+a}{y-a}[/tex]

xy-ax=y+a
xy-y=ax+a
(x-1)y=a(x+1)

y=[tex]\frac{a(x+1)}{x-1}[/tex]

[Guest]

Ok, Thanks.