Question 674044
Let   	x	be the number of 	miles									
Ford			26	+	0.16	x						
chevrolet			23	+	0.18	x						
Ford	>	chevrolet										
26	+	0.16	x			>	23	+	0.18	x		
add  	-26	to both sides										
26+0.16n-26>23	+0.18x-26
0.16	n-	-23	>			>	0.18	x	-3			
add  	-0.18	x										
-0.02	x	>	-3									
/	-0.02											
x	<	150										
x should be less than 150 for 	Ford	to be a better deal	

OR Chevrolet will be expensive after 150 miles