8
x + 2y = 6 ;
x + y = 4 ;
y = -x + 4 ;
Substitution method: ;
x + 2(-x + 4) = 6 ;
x - 2x + 8 = 6 ;
-x + 8 = 6 ;
-x = 6 - 8 ;
-x = -2 ;
x = 2 ;
x + 2y = 6, x = 2 ;
2 + 2y = 6 ;
2y = 6 - 2 ;
2y = 4 ;
y = 4/2 ;
y = 2 ;
Solution set: (2, 2)
Added 7/21/2019 6:51:15 PM
This answer has been confirmed as correct and helpful.