Question 320394
50+.20X<20+.50X
.20X-.50X<20-50
-.30X<-30
X>-30/-.30 NOTE THE SIGN CHANGE WHEN DIVIDING BY A NEGATIVE VALUE.
X>100 MILES IS THE BREAK EVEN POINT.
THUS ANY MILES OVER 100 MILES MAKES BASIC A BETTER DEAL.
PROOF:
LET THE MILEAGE BE 105 MILES.
50+.20*105<20+.50*105
50+21<20+52.5
71<72.5