can someone explain to me how -y=-|x|+2 turns into y=|x|-2

Printable View

- Jan 25th 2010, 07:01 PMwonderdquick easy question im sure
can someone explain to me how -y=-|x|+2 turns into y=|x|-2

- Jan 25th 2010, 07:02 PMSudharaka
Dear wonderd,

Multiply the whole equation by -1. - Jan 25th 2010, 07:46 PMwonderd
i dont understand, i do understand that to get the y by itself you divide by -1 but what are you suspose to do to the other side of the equal sign?

can someone explain how to divid -1 by -|x|+2 properly? - Jan 25th 2010, 08:12 PMfishcake
- Jan 25th 2010, 08:41 PMwonderd
thank you :)

- Jan 26th 2010, 04:43 AMHallsofIvy
Or, as sudharaka said,

**multiply**both sides of the equation by -1:

(-1)(-y)= (-1)(-|x|+ 2). The left is, of course, y and on the right you have (-1)(-|x|)+ (-1)(2)= |x|- 2. - Jan 26th 2010, 05:50 AMArchie Meade