8
7x + 3y = -17
x = 19 - 4y;
7(19 - 4y) + 3y = -17;
133 - 28y + 3y = -17;
133 - 25y = -17;
-25y = -17 - 133;
-25y = -150;
y = -150/-25;
y = 6;
x = 19 - 4(6);
x = 19 - 24;
x = -5;
The solution set is (-5, 6).
Added 3/22/2015 3:31:14 AM
This answer has been confirmed as correct and helpful.
