Answer: [tex]18x+81[/tex]
Add parentheses beside 9
[tex]Before: 9(2x + 9)\\After:(9)(2x+9)[/tex]
Multiply each side by 9
[tex](9)(2x)+(9)(9)\\18x+81[/tex]
Answer:
[tex]9(2x + 9) \\= 18x + 81[/tex]
