8
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 3/28/2018 2:26:58 AM
This answer has been confirmed as correct and helpful.