I'm guessing you'd combine them. And the end equation would be
81x6y
The second one is the only equivalent equation. Simply plug in each variable in each equation. And compare!
Kyle leaves 1.80 because you have to do 0.15*12
162 × 1.40
new price = 226.8
-20 because after the the thermometer hits zero the more negative the temperature gets the colder it is
