Which equation shows the substitution method being used to solv the system of equations?
x+y=6
x=y+2
A(y+2)+y=6
Bx+y=y+2
Cx=(x-6)+2
Dx+(y+2)=6
x+y=6
x=y+2
A(y+2)+y=6
Bx+y=y+2
Cx=(x-6)+2
Dx+(y+2)=6