Algebra

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by rijul007 » Wed Apr 11, 2012 8:41 pm
sana10 wrote:Solve the equation 2|3x - 2| - 3 = 7.

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Case 1: x > 2/3 or x = 2/3

2(3x-2)-3 = 7
6x-4-3 = 7
6x = 14
x = 7/3


Case 2: x<2/3
2(2-3x) - 3 = 7
4-6x -3 = 7
6x = -6
x = -1


x = 7/3 or -1

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by GMATGuruNY » Wed Apr 11, 2012 10:02 pm
sana10 wrote:Solve the equation 2|3x - 2| - 3 = 7.

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2|3x-2| - 3 = 7
2|3x-2| = 10
|3x-2| = 5

Case 1: 3x-2 = 5
3x = 7
x = 7/3.

Case 2: 3x-2 = -5
3x = -3
x = -1.

x=7/3 or x=-1.
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by amit28it » Wed Apr 11, 2012 11:50 pm
sana10 wrote:Solve the equation 2|3x - 2| - 3 = 7.

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On solving this equation you will get 7/3 in this manner:
2|3x - 2| - 3 = 7.
6x-4-3 = 7
6x = 14
x = 14/6 that is
x = 7/3
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