Question 426990
Tim's age	x												
Coach age	x	+	10										
	3	years before											
Tim's age	x		-3										
Coach age	x+10-3=x+7			
Coach is 	2	times older											
x+7=2(x	-3)		
x+7=2x-6			
2x-x=7+6					
x=13	Tim's age								
x+10=23	years Coach's age