Question 1113365
	x	Sprinker in scotts family, hours			hours	40			
	y	sprinker in Parkers family,hours			liters	1375			
Equation for total investors									
									
1	x	+	1	y	=	40	.............1		
									
Equation for amount raised									
25	x	+	40	y	=	1375	.............2		
Eliminate y									
multiply (1)by		-40							
Multiply (2) by		1							
-40	x		-40	y	=	-1600			
25			40	y	=	1375			
Add the two equations									
-15	x				=	-225			
/	-15								
x	=	15							
plug value of			x	in (1)					
1	x	+	1	y	=	40			
15		+	1	y	=	40			
			1	y	=	25			
				y=		25			
									
	15 hours	Sprinker in scotts family							
	25  hours	sprinker in Parkers family