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Simplifying Algebraic Equations

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Simplifying Algebraic Equations
mstcrow5429 Offline
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#1
08-03-2007, 08:32 PM
I am trying to simplify the following equation:

[3(x + 2) + 2x] - [4(y + 2) - 3(y - 2)]

This is how I'm processing it:

[3x + 6 + 2x] - [4y + 8 - 3y + 6]
[5x + 6] - [14 + y]
5x + 6 - 14 + y = 5x + y -8

However, the text gives the answer as:

5x - y - 8

So what am I doing wrong? Thanks.
Excelsior, BS, pursuing degree

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sgloer Offline
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#2
08-03-2007, 09:07 PM
- [14 + y]

You have to apply the (-) to both items inside of the brackets, so - [14 + y] simplifies to -14 - y
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mstcrow5429 Offline
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#3
08-03-2007, 09:16 PM
K, thanks. Didn't realize you had to multiply by the sign, just as you would if it was say -5, or 2.
Excelsior, BS, pursuing degree

Completed:
CLEP: Hum. (67), Hist. of U.S. I (74), Hist. of U.S. II (71), Intro. Psych. (69), Intro. Soc. (72), Soc. Sci. and Hist. (74), Western Civ I (72), Western Civ II (70), Am. Lit. (60), Intro. to Educ. Psych. (62), P. of Management (74), P. of Market. (74), Intro. Bus. Law (67), P. of Accounting (60), AmGov (68)
DSST: Ethics in Am. (76), P. of Super.(67), HRM (65), Intro to Bus. (70), MIS (65), P. of Fin (62), M&B (65), P. of Stat. (68)
ECE: OB (B)
TECEP:: IntFin, SecAna

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Total Credits: 129
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stitches013 Offline
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#4
08-04-2007, 08:15 AM
If you have not used ALEKS yet, you should give it a try. I have been using it for about two weeks now and I must say I am impressed with How fast it has refreshed my memory on things. I think it would help someone with learning as well. Their method is; test, review, practice, practice practice, test, review, etc... I do not see any way you could NOT learn with this service. My $.02, everyone practicing for mathematics CLEPs below the calculus level should try this service.
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