# Math Help

Discussion in 'Community Discussion' started by mgargan1, Oct 22, 2006.

1. ### mgargan1 macrumors 65816

Joined:
Feb 22, 2003
Location:
Reston, VA
#1
My little brother needs help in 8th grade algebra, and it's been a while for me...

Here is the question:
Find a number that is 38 less than it's opposite.

Would that be x= -|x|-38

Thanks!

2. ### Shaun.P macrumors 68000

Joined:
Jul 14, 2003
Location:
Omicron Persei 8
#2
It worries me that I'm in my 2nd year of a maths degree and can't do this question...

3. ### zap2 macrumors 604

Joined:
Mar 8, 2005
Location:
Washington D.C
#3
No solution..that always the answer when I don't know!

4. ### twistedlegato macrumors 65816

Joined:
Jun 15, 2006
#4
umm!

x= -|x|-38

the | | means find the absolute value, and x is in the center so fin the absolute value of x but since it has a negitive sighn out of the absolute value symbol.

Maybe that would help him! Good luck!

5. ### MBHockey macrumors 68040

Joined:
Oct 4, 2003
Location:
New York
#5
I think it's just:

-x - 38 = x

so, x = -19

Which makes sense. -19 is 38 less than its opposite, +19.

6. ### psychofreak Retired

Joined:
May 16, 2006
Location:
London
#6

Edit: AAH...you got there first

7. ### twistedlegato macrumors 65816

Joined:
Jun 15, 2006
#7

x=-19

And im only in 7th grade

8. ### amateurmacfreak macrumors 6502a

Joined:
Sep 8, 2005
#8
Yep.

x=-x-38

Which would be x=-19.

Like everyone else has said.