Simplify 9x + 3y - 6 - 5x + 4y -3

To simplify 9x + 3y - 6 - 5x + 4y - 3, we can combine like terms.

Combining the x terms:
9x - 5x = 4x

Combining the y terms:
3y + 4y = 7y

Combining the constant terms:
-6 - 3 = -9

So the simplified expression is 4x + 7y - 9.