## Precalculus (6th Edition) Blitzer

$x+45$
We start with the given expression: $7x+3[9-(2x-6)]$ We apply the distributive property on the inner parentheses: $7x+3[9-2x+6]$ We combine like terms within the bracket: $7x+3[15-2x]$ We apply the distributive property on the bracket: $7x+45-6x$ We combine like terms: $x+45$