Chapter 9 - Roots and Radicals - Chapters 1-9 Cumulative Review Problem Set - Page 432: 7

$-9$

Substituting $x=-4$, the given expression, $ 3(2x-1)-4(2x+3)-(x+6) ,$ evaluates to \begin{array}{l}\require{cancel} 3(2(-4)-1)-4(2(-4)+3)-((-4)+6) \\\\= 3(-8-1)-4(-8+3)-(-4+6) \\\\= 3(-9)-4(-5)-(2) \\\\= -27+20-2 \\\\= -9 .\end{array}