Skills Handbook - Solving and Writing Linear Equations - Exercises - Page 894: 9

$-5=w$

We start with the given equation: $(w+5)-5=(2w+5)$ We apply the associative property of addition to remove the grouping of terms: $w+5-5=2w+5$ We subtract $w$ and $5$ from both sides of the equation and combine like terms: $$w-w+5-5-5=2w-w+5-5$$$$-5=w$$