Any hints on where I went wrong?

When checking the solution in the original equation, I got the false answer of:

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- March 4th 2006, 08:55 AM #1

- March 4th 2006, 09:19 AM #2

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- March 5th 2006, 04:54 AM #3

- March 7th 2006, 12:04 PM #4
## Ok, thanks guys.

The reason I became confused is, in simplifying equations like

I thought we were supposed to treat the negative sign in the middle as a subtraction sign. I thought we were to solve the two multiplication problems first, then subtract. I could swear I've seen situations that were similar enough in that vein, to confuse me about*this*situation. If that's the case, I need to learn to tell the difference.

Thankfully, at least the variable was correct this time, so I'm improving.

- March 7th 2006, 01:45 PM #5Originally Posted by
**Euclid Alexandria**

When I was learning this my teacher always insisted that we write expressions like as . That way you never have to worry about whether or not you are adding or subtracting...you are ALWAYS adding.

Hope it helps!

-Dan

- March 8th 2006, 06:45 PM #6
## Thanks for the tip.

I was doing this for a while, but have been trying to wean myself off of it. I still use it for larger problems, but might continue sticking with it for a while in every case.

Btw, I finally noticed my error while resolving that equation, so disregard my previous post!

- March 9th 2006, 05:32 AM #7