determine whether it is a solution to 4x+7y= -19
(6, 2) No
4*6 + 7*2 = -19
24 + 14 = -19
38 = -19 False
(4, 5) No
4*4 + 7*5 = -19
16 + 35 = -19
51 = -19 False
(-3, -1) Yes
4*-3 + 7*-1 = -19
-12 -7 = -19
-19 = -19 True
(-8, 4) No
4*-8 + 7*4 = -19
-32 +28 = -19
-4 = -19 False
