Question 437121
Showelling the snow is one job						
Sue	30	minutes				
she does	  1/30	of the job in 1 	minute			
Jim	35	minute				
he does	  1/35	of thejob in 1 	minute			
Together they will do 	 1/30	+	  1/35	+	
Together they will do 	 6/97	of the job in one minute
So they will take 16 1/7 minutes			


(7y-14/(2-y)
-7(2-y)/(2-y)
=-7