Answer
Translation to algebraic expression (not simplified yet):
$x - (8-x)$
Simplified form:
$2x-8$
Work Step by Step
Let
$x$ = the unknown number
The difference between 8 and the number = $8-x$
A number decreased by the difference between 8 and the number = $x - (8-x)$
Simplifying gives:
$=x-8-(-x)
\\=x-8+x
\\=2x-8$
