Algebra: A Combined Approach (4th Edition)

$0.2(k+8)-0.1k=0.1k+1.6$
$0.2(k+8)-0.1k$ Multiply $0.2$ by every term inside the parentheses: $0.2(k+8)-0.1k=0.2k+1.6-0.1k=...$ Simplify like terms: $...=0.1k+1.6$