\(-2(1-x) \leq 2x-7\\-2+2x \leq 2x-7\\-2 \leq -7\\\sf There~are~no~solutions~to~this~inequality\)
There are no solutions because the last, final inequality is false.
\(\sf Number ~of ~20~dollar~bills = n\\20n \leq 100\
= 5\)
You can only take a maximum of 5 twenty dollar bills in one transaction.
