Question 521237
Let x be the number of 		hours				
DJ Joe			0	+	100.00	x
DJ Dan			150	+	75.00	x

For 2 hours
DJ Joe	0	+	100.00	*	2		=		200		
DJ Dan	150	+	75.00	*	2		=		300

For 8 hours

DJ Joe	0	+	100.00	*	8		=		800
DJ Dan	150	+	75.00	*	8		=		750

Better deal

DJ Joe	<	DJ Dan								
0	+	100.00	x 			<	150	+	75.00	x 
0	+	100.00	x 			<	150	+	75.00	x 
0	-	150				<	75	x	-100	x
-150	<	-25	x 							
6	>	x								
x should be less than			6	hours