[tex]\\ \rm\Rrightarrow (8x-8y+9)-(5x-8y-z)[/tex]
[tex]\\ \rm\Rrightarrow 8x-8y+9-5x+8y+z[/tex]
[tex]\\ \rm\Rrightarrow 8x-5x-8y+8y+z+9[/tex]
[tex]\\ \rm\Rrightarrow 3x+z+9[/tex]
Answer:
3x-z+9
Step-by-step explanation:
