# transform x-2y>-4?

• April 2nd 2010, 02:16 PM
andrelt375
transform x-2y>-4?
solve for y, x-2y>-4(Happy)
• April 2nd 2010, 02:45 PM
Anonymous1
Quote:

Originally Posted by andrelt375
solve for y, x-2y>-4(Happy)

x-2y>-4
=> x+4 > 2y
=> y< (x+4)/2
• April 2nd 2010, 02:45 PM
pickslides
Hi there andrelt375, you now to employ your knowledge and algebra and inequalities here.

We need to isolate $y$

$x-2y>-4$

First, lets take $x$ from both sides.

$x{\color{red}-x}-2y>-4{\color{red}-x}$

Gives us

$-2y>-4-x$

Now we need to divide each side by $-2$ . When we divide through by a negative value the sign will flip the other way.

$\frac{-2y}{{\color{red}-2}}<\frac{-4-x}{{\color{red}-2}}$

Leaving

$y<\frac{-4-x}{-2}$

This can be simplified further as

$y<\frac{-4}{-2}+\frac{-x}{-2}$

$y<2+\frac{x}{2}$

And we are finished. (Hi)
• April 2nd 2010, 02:48 PM
Anonymous1
Quote:

Originally Posted by pickslides
Hi there andrelt375, you now to employ your knowledge and algebra and inequalities here.

We need to isolate $y$

$x-2y>-4$

First, lets take $x$ from both sides.

$x{\color{red}-x}-2y>-4{\color{red}-x}$

Gives us

$-2y>-4-x$

Now we need to divide each side by $-2$ . When we divide through by a negative value the sign will flip the other way.

$\frac{-2y}{{\color{red}-2}}<\frac{-4-x}{{\color{red}-2}}$

Leaving

$y>\frac{-4-x}{-2}$

This can be simplified further as

$y>\frac{-4}{-2}+\frac{-x}{-2}$

$y>2+\frac{x}{2}$

And we are finished. (Hi)

You accidentally flipped twice I think.