Question 433980
b/2 - a/3 = 7
3b-2a =6*7
3b-2a=42.............1
 
b/5 + a/6 = 1

6b+5a= 30*1
6b+5a= 30............2

-2a+3b=	42	.............1	
5a+6b=30	.............2	
Eliminate y								
multiply (1)by 	-4						
Multiply (2) by	2						
8a-12b=	-168		
10a+12b=60		
Add the two equations								
18a				=	-108		
/18							
a=-6		
plug value of 			a	in (1)				
-2a+3b=	42		
12+3b=42		
3b=42-12
3b=30		
b=10