Question 431347
Treat I	x 	Numbers						
Treat II--	y	Numbers						
x+y=25	.............1			
2x+4.5y	=70.............2			
Eliminate y 				
multiply (1)by 	-4.5								
Multiply (2) by	1								
-4.5x-4.5y=-112.5				
2x+4.5y=70				
Add the two equations										
-2.5x=-42.5				
/-2.5									
x=17 		Treat I				
plug value of x	in (1)						
x+y=25				
17+y=25				
y=25-17		
y=8				
y=8	Treat II