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Solve by the elimination method. 5a + 4b = -2 -5a + b = 37
5a + 4b = -2 ; -5a + b = 37; (5a + 4b = -2) + (-5a + b = 37) ; 5b = 35 ; b = 35/5 ; b = 7 ; 5a + 4(7) = -2 ; 5a + 28 = -2 ; 5a = -2 - 28 ; 5a = -30 ; a = -30/5 ; a = -6 ; Solution set: (a = -6, b = 7)
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Asked 4/24/2013 9:02:29 PM
Updated 250 days ago|11/10/2018 11:01:48 PM
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Edited by Masamune [11/10/2018 10:59:56 PM]
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5a + 4b = -2 ;
-5a + b = 37;

(5a + 4b = -2) + (-5a + b = 37) ;
5b = 35 ;
b = 35/5 ;
b = 7 ;

5a + 4(7) = -2 ;
5a + 28 = -2 ;
5a = -2 - 28 ;
5a = -30 ;
a = -30/5 ;
a = -6 ;

Solution set: (a = -6, b = 7)
Added 250 days ago|11/10/2018 11:01:48 PM
This answer has been confirmed as correct and helpful.
Deleted by Masamune [11/10/2018 11:02:24 PM], Undeleted by Masamune [11/10/2018 11:02:28 PM], Confirmed by Masamune [11/10/2018 11:02:35 PM], Masamune [11/10/2018 11:02:36 PM]
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