Introductory Algebra for College Students (7th Edition)

$x=-9$
$8x-3x=-45$ First combine the like terms. $(8-3)x=5x=-45$ Then divide both sides by 5. $\frac{5x}{5}$=$\frac{-45}{5}$ $x=-9$ Check the answer. 8(-9)-3(-9)=-45 -72-(-27)=-45 -72+27=-45 -45=-45