solve the system by substitution. 6x+8y=44 4x-8y= -64 simplify your answer type an ordered pair.

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Asked 11/11/2011 4:21:09 PM

Updated 3/13/2018 6:29:41 PM

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Question

Asked 11/11/2011 4:21:09 PM

Updated 3/13/2018 6:29:41 PM

1 Answer/Comment

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Flagged by Masamune [3/13/2018 6:29:39 PM]

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6x + 8y = 44 ;

4x - 8y = -64;

(6x + 8y = 44) + (4x - 8y = -64) ;

10x = -20 ;

x = -20/10 ;

x = -2 ;

6(-2) + 8y = 44 ;

-12 + 8y = 44 ;

8y = 44 + 12 ;

8y = 56 ;

y = 56/8 ;

y = 7 ;

Solution set: (-2, 7)

4x - 8y = -64;

(6x + 8y = 44) + (4x - 8y = -64) ;

10x = -20 ;

x = -20/10 ;

x = -2 ;

6(-2) + 8y = 44 ;

-12 + 8y = 44 ;

8y = 44 + 12 ;

8y = 56 ;

y = 56/8 ;

y = 7 ;

Solution set: (-2, 7)

Added 3/13/2018 6:29:41 PM

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