Which equations are linear equations.
Equations-
A. 2(w+6)=22 ,
B. w^2+6=22 ,
C. w over 2+6=22 ,
D. 2w+6=22,
E. 5x+3=-8x+ 7 over 9,
F. 1 over 3 x^2- 7=0,
G. x+x+2 over 4=7,
H. 5x-7=9x ,
I.x^3-19= 5 over 3,
J.5.2+7x=2x+4x,
K.3 over 4 x+x-1=9(2-x),
L.x^3 over 5+6=22