Question 414237
twice a number is 4 more than 3 times another number. if 2 less than 7 times the second number, what are the two numbers?

one number =x
other number = y
..
2x= 3y+4
2x-3y=4...............1
7y-2=2x
7y-2x=2..............2

multiply (1)by 					1			
Multiply (2) by					1			
2x-3y=4
-2x+7y	=2		
								
Add the two equations							0
4y=6		
/4							
								
y=1.5					
Plug value of y in 							
2x-3y=4		
2x-4.5=	4		
2x=8.5		
/2							
x=4.25