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The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. True False
The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. TRUE. -4x + 2y = 2 ; y = -x - 2 ; -4x + 2(-x - 2) = 2 ; -4x - 2x - 4 = 2 ; -6x - 4 = 2 ; -6x = 2 + 4 ; -6x = 6 ; x = 6/-6 ; x = -1 ; y = -(-1) - 2 ; y = 1 - 2 ; y = -1 ; Solution set: x = -1, y = -1
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Asked 2/1/2013 8:34:34 AM
Updated 7/13/2018 12:07:30 PM
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The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. TRUE.

-4x + 2y = 2 ;
y = -x - 2 ;

-4x + 2(-x - 2) = 2 ;
-4x - 2x - 4 = 2 ;
-6x - 4 = 2 ;
-6x = 2 + 4 ;
-6x = 6 ;
x = 6/-6 ;
x = -1 ;

y = -(-1) - 2 ;
y = 1 - 2 ;
y = -1 ;

Solution set: x = -1, y = -1
Added 7/13/2018 12:07:30 PM
This answer has been confirmed as correct and helpful.
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