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Algebra
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OpenStudy (anonymous):
Solve for x: |x| -8 = -5
A. x: -13 and x: -3
B. x: 3 and x: -3
C. x: 3 and x: 13
D. No solution.
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OpenStudy (anonymous):
How do you isolate the variable?
OpenStudy (anonymous):
Adding 8? @mthompson440
OpenStudy (anonymous):
yes, so what is the new equation?
OpenStudy (anonymous):
X: 3 ? @mthompson440
OpenStudy (anonymous):
it should read the absolute value of = 3
So, what does the absolute value mean?
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OpenStudy (anonymous):
I'm not really sure. @mthompson440
OpenStudy (anonymous):
Think of it like this . . .
On a number line -3 -2 -1 0 1 2 3
the absolute value of three is three in both directions.
So + or -
OpenStudy (anonymous):
So it's +3? @mthompson440
OpenStudy (anonymous):
an example of the absolute value of "a" is "a" in both directions
+a and -a
OpenStudy (anonymous):
Oh okkk. @mthompson440
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OpenStudy (anonymous):
the absolute value of -a is still a
because it is "a" places away from the zero
OpenStudy (anonymous):
Oh ok. So the answer is x: 3 and x:-3?
OpenStudy (anonymous):
@mthompson440
OpenStudy (anonymous):
so in this case the absolute value of -3 is still 3.
Yes, 3 and -3
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