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Q: 5x + 2y = -2 x = y + 5
A: 5x + 2y = -2 ; x = y + 5 ; 5(y + 5) + 2y = -2 ; 5y + 25 + 2y = -2 ; 7y + 25 = -2 ; 7y = -2 - 25 ; 7y = -27 ; y = -27/7 ; x = y + 5 ; x = -27/7 + 5 ; x = 8/7 ; Solution set: (8/7, -27/7)
Question
Updated 86 days ago|3/28/2018 2:26:58 AM
Edited by Masamune [3/28/2018 2:26:57 AM]
Rating
3
5x + 2y = -2 ;
x = y + 5 ;

5(y + 5) + 2y = -2 ;
5y + 25 + 2y = -2 ;
7y + 25 = -2 ;
7y = -2 - 25 ;
7y = -27 ;
y = -27/7 ;

x = y + 5 ;
x = -27/7 + 5 ;
x = 8/7 ;

Solution set: (8/7, -27/7)
Added 86 days ago|3/28/2018 2:26:58 AM

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