it took david ten minutes more to walk home from school than it took him to walk to school from home. if the total walking time from home to school and back aga

Question

 it took david ten minutes more to walk home from school than it took him to walk to school from home. if the total walking time from home to school and back again was 54 minutes, how long did it take him to walk to school

Answer 1

If we let x = the amount of time it took David to walk to school from home, then

 

(x + 10) = the amount of time it took David to walk from school to home

 

The sum of these two must equal to 54, so we have:

 

x + (x + 10) = 54

 

2x + 10 = 54

 

2x = 44

 

x = 22 minutes = the amount of time it takes David to walk from home to school