## Intermediate Algebra (12th Edition)

$-6z-39$
Using $a(b+c)=ab+ac$ or the Distributive Property and then combining like terms, the given expression, $2+3(2z-5)-3(4z+6)-8 ,$ simplifies to \begin{array}{l}\require{cancel} 2+6z-15-12z-18-8 \\\\= (6z-12z)+(2-15-18-8) \\\\= -6z-39 .\end{array}