Question 427984
0.1x+0.7y=-2.3
0.3x-0.2y=2.3
multiply both equations by 10

x+7y=-23
3x-2y=23

x+7y=-23	.............1				
-2y=23-3	x---------2				
/-2									
y=-11.5-	1.5x					
Plug the value of y in (1)											
x+7(-11.5+1.5x)=	-23
x-80.5+10.5x)=-23			
x+10.5x=	-23				
11.5x=57.5								
/11.5										
x=5										
Plug the value of x in (1)											
x+7y=-23					
5+7y=-23				
5+7y=-23						
7y=-28								
/7										
y=-4