Find the sum of the given polynomials.

ax + by + c, 2ax - 3by + c, and by - c

3ax - by + c
3a + x - bc
3ax + by - cd
bx - 3bc + a

  ax +  by + c
2ax - 3by + c
            by - c   
3ax - by + c   First Option.

You must align like terms before adding them. This is to ensure that there will be no confusion in getting the sum of the given polynomials.

If you would like to find the sum of the given polynomials, you can do this using the following steps:

ax + by + c + 2ax - 3by + c + by - c = ax + 2ax + by - 3by + by + c + c - c = 3ax - by + c

The correct result would be 3ax - by + c.