Equations are equivalent when you can obtain one by subtracting, adding, dividing, or multiplying the same number on the other. 
Which of the following equations are not equivalent to $x+3=11$ 
A. $x+3+5=11+5$ 
B. $2x=28$ 
C. $x+3-11=11-11$ 
D. $x+3-11=0$ 