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3x-y=9

 Jul 16, 2017
 #1
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x and y could be anything really......

 Jul 16, 2017
 #2
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3x-y=9

    +y     +y

3x=9+y

divide both sides by 3

3x/3=(9+y)/3

x     = 3+(y/3)

choose any number for y, put it in the equation and solve for x, this will create a line as this is a line equation.

 Jul 16, 2017
 #3
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You have not asked a question. 

 Jul 16, 2017

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