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Mathematics 18 Online
OpenStudy (cenaida):

Solve: |2n - 3| = 5

OpenStudy (campbell_st):

there are 2 equations to solve 2n - 3 = 5 and 2n - 3 = -5 hope this helps

OpenStudy (cenaida):

so which one of these can it be? A. {-1, 4} B. {1, 4} C. {-1, 1} D. {1, -4}

OpenStudy (whpalmer4):

Well, let's solve the equations. \[2n - 3 = 5\] If you want to get \(n\) all alone on the left, what should you do first?

OpenStudy (cenaida):

add 2 on both sides?

OpenStudy (anonymous):

3*

OpenStudy (whpalmer4):

Adding 3 to both sides would be a good start: \[2n-3+3 = 5 +3 \]\[2n=8\]Now what?

OpenStudy (cenaida):

divide 2 with 8?

OpenStudy (whpalmer4):

Divide both sides by 2...

OpenStudy (cenaida):

yes then it will be n=4?

OpenStudy (whpalmer4):

Yes. So that's half of the problem done. Now we need to solve the other one: \[2n -3 = -5\]How would you go about it?

OpenStudy (cenaida):

add -3 on both sides

OpenStudy (anonymous):

1ST 1 .2n-3=5 or,2n=5+3 or,2n=8 so,n=4 easy then 2n-3=-5 or,2n=-5+3 or,2n=-2 so.n=-1 ans

OpenStudy (whpalmer4):

I would add 3 to both sides: \[2n - 3 + 3 = -5 + 3\]\[2n = -2\] \[n =\]

OpenStudy (cenaida):

Ok Aaron thanks!

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