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

$x=4$
$4(x+1)=20$ $4x+4=20$ $4x=20-4$ $4x=16$ $\frac{4x}{4}=\frac{16}{4}$ $x=4$ Check the answer. 4(4+1)=20 4(5)=20 20=20