It's final exam week. Our teacher is reviewing the material given in class this long semester. However, there are questions that he did not have time to go over but that might be on the final.

Here is a sample:

Solve for x.

|x - 3| = |3x + 2| - 1

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- Dec 21st 2008, 11:55 AMmagentaritaAbsolute Value Equations
It's final exam week. Our teacher is reviewing the material given in class this long semester. However, there are questions that he did not have time to go over but that might be on the final.

Here is a sample:

Solve for x.

|x - 3| = |3x + 2| - 1

- Dec 21st 2008, 12:53 PMmasters
Hello Magentarita,

__Case 1:__

$\displaystyle x-3=(3x+2)-1$

$\displaystyle x=-2$

This solution does not work with the original equation, so throw it out.

__Case 2:__

$\displaystyle x-3=-(3x+2)-1$

$\displaystyle x=0$

This solution does not work with the original equation, so throw it out.

__Case 3:__

$\displaystyle -(x-3)=(3x+2)-1$

$\displaystyle \boxed{x=\frac{1}{2}}$

This solution works, so keep it.

__Case 4:__

$\displaystyle -(x-3)=-(3x+2)-1$

$\displaystyle \boxed{x=-3}$

This solution works, so keep it.

- Dec 21st 2008, 07:06 PMmagentarita4 cases....