Working together, Tyler and Evan painted a fence in 8 hours. If it takes Tyler 12 hours less than it takes Evan to paint the fence, how long does it take Evan to paint the fence alone?

24hours

Step-by-step explanation:

let Evan be x, Tyler=x-12, equate; 1/x+1 / (x-12) = 1/8, to get x=24 or 4. The correct value of x=24 because if you take x=4 means that Tyler=-8hours which is impossible