Answer:
A, B, C
Step-by-step explanation:
We can start by combining like terms in all of these equations:
A:
-19x + 91 = -19x + 91
-19x = -19x
x = x
A is correct
B:
-19x - 38 = -19x - 38
-19x = -19x
x = x
B is correct
C:
-19x - 19 = -19x - 19
-19x = -19x
x = x
C is correct
D:
-19x - 19 = -19x + 19
We see from here that these are not identifcal equations, so therefore choice A,B and C are correct.
