Question 416227
ordinary time = x
overtime = y 
x+y = 50............1

0.60x+0.90y=32.40
multiply by 100
6x+9y=3240...........2

...
x+y=50	.............1	
6x+9y=3240	.............2	
								
multiply (1)by 	-6			
Multiply (2) by 1	

multiply (1)by 					-6	
Multiply (2) by					1	
-6x-6y=	-300
6x+9y=324
						
Add the two equations						
						
3y=24
						
/3					
						
y=8 overtime hours			
Plug value of y in 					
1x+1y=50
1x+8=50
x=42 normal hours