Answer:
A and D
Step-by-step explanation:
x+x+x+2=3x+2
A does work because 3x+2=3x+2 (I think A might've been a typo)
B doesn't work because the coefficients are switched
C doesn't work because that's 3x+6
D does work because that evaluates to 2x+2+x=3x+2
E doesn't work because it's not 3x+2x
