3+6x=11-4y
I do not know if you want to solve for y or solve for x so I will do both.
Solve for x:
3+6x=11−4y
6x=8−4y
x=8−4y6
Solve for y:
−8+6x=−4y
−8+6x−4=y
y=−8+6x−4