Yes that is correctttttttttttttttt
Answer is x+9=11
6+x=9
x=3
15=x+12
x=3
7+x=10
x=3
x+9=11
x=2
So x+9=11 has a different x value than the rest of the equations. So it doesn't belong with the other three.
C is also the best answer
Which that apply?
but some easy ones that comes to mind are 36/1000 and 9/250