Answer:
[tex]-54y+63[/tex]
Step-by-step explanation:
[tex]9\{[4(y-4)+18]-[2(5y-2)-1]\}[/tex]
Simplifying the innermost parenthesis by distribution and simplifying.
[tex]9\{[4y-16+18]-[10y-4-1]\}[/tex]
[tex]9\{[4y+2]-[10y-5]\}[/tex]
Now, reversing the signs of the terms inside brackets coming after negative sign to remove the brackets.
[tex]9\{4y+2-10y+5\}[/tex]
Combining like terms
[tex]9\{-6y+7\}[/tex]
Using distribution to remove the braces.
[tex]-54y+63[/tex]
