Simplify 9x + 3y + - 6 - 5x + 4y - 3
To simplify the expression 9x + 3y - 6 - 5x + 4y - 3, we can combine like terms.
First, let's group the x terms together and the y terms together:
(9x - 5x) + (3y + 4y) + (- 6 - 3)
This simplifies to:
4x + 7y - 9