Answer: x+2y = 10 and x+2y = 20
Step-by-step explanation:
Anything parallel to Ax+By = C is of the form Ax+By = D, where C ≠ D
We'll keep the "x+2y" portion the same. The right hand side can be any number we want as long as you don't pick 6. Since D can be any value but 6, there are infinitely many answers you could go for.
I picked 10 and 20 as the two random values to generate the answers shown above. Those two lines are parallel to x+2y = 6.
I recommend using a graphing tool like Desmos or GeoGebra to confirm the answers are correct.