Question 190687
40*4+.20x>51*4+.16x
150+.20x>204+.16x
.2ox-16x>204-150
.04x>54
x>54/.04
x>1,350 miles will make plan B a better buy.
Proof:
Let x=1,351
160+.2*1,351>204+.16*1,351
160+270.2>204+216.16
430.20>420.16