Simplify 9x+3y−6−5x+4y−3

To simplify the expression \(9x + 3y - 6 - 5x + 4y - 3\), combine like terms:

1. Combine the \(x\) terms:

   • \(9x - 5x = 4x\)

2. Combine the \(y\) terms:

   • \(3y + 4y = 7y\)

3. Combine the constant terms:

   • \(-6 - 3 = -9\)

Putting it all together, the simplified expression is:

\[ 4x + 7y - 9 \]