## Introductory Algebra for College Students (7th Edition)

$z=3$
$2z=-4z+18$ First add 4z to both sides. $2z+4z=18$ $6z=18$ Then divide both sides by 6. 6z$\div$6=18$\div$6 $z=3$ Check the answer. 2(3)=-4(3)+18 6=-12+18 6=6