Earl solved a system of equations using substitution. Did he do it correctly? How doyou know? If he did not, find his error and solve the system correctly. x + y = 3
2y - 3x = 16

Earl's solution:
2(3-x)=3x+16
6-x-3x=16
6-4x=16
6-6-4x = 16-6
-4x=10
-4x/4 = 10/-4
x=-2.5 y=5.5