ILL MARK BRAINLIEST.

Which One Doesn't Belong? Determine which equation fromthe four below doesn't belong and justify your answer. Could there be a different answer?
A. solve for x: 2x + 6 + 1x = 3x + 6
B. solve for x: 5x + 6 + -2x = 3x + 6
C. solve for x: 3x + 7 = 3(x +2)
D. solve for x: 2x + 6 = 3x + 7​