Question 540508
4	m	+	9	z	=	7	.............1	
2	m		-2	z	=	3	.............2	
Eliminate 	z							
multiply (1)by 		2						
Multiply (2) by		9						
8	m		18	z	=	14		
18	m	+	-18	z	=	27		
Add the two equations								
26	m				=	41		
/	26							
m	=	1.58						
plug value of 			m	in (1)				
4	m	+	9	z	=	7		
6.31		+	9	z	=	7		
			9	z	=	7		-6.31
			9	z	=	0.69		
				z	=	0.08