We can add the given equations like this:
1. Add the terms on the left side of both equations.
(-2x + 4y) + (3x - 10y) = -2x + 4y + 3x - 10y
2. Combine like terms
-2x + 3x + 4y - 10y = x - 6y
3. Add the terms on the right of both equations
17 - 3 = 14
Then, we get x - 6y = 14, the third option is the correct answer.
