Question 449402
3x+y=7	.............1	
x+2y=4	.............2	
Eliminate y								
multiply (1)by 	-2						
Multiply (2) by	1						
-6x-2y=-14		
x+2y=4		
Add the two equations								
-5x=-10		
/-5							
x=2						
plug value of 	x	in (1)				
3x+y=7		
6+y=7		
y=7-6
y=1