Max was on vacation twice as long as Jerrad and half as long as Wesley. The boys were on vacation a total three weeks. How long did each boy vacation?

3 weeks = 21 days

Let Jerrad's vacation be X then Max's be 2X and Wesley's 4X

X+2X+4X=21

7X=21 devide by 7

X=3 so Jerrad had 3 days vacation

2*3 = 6 Max had 6 days

4*3=12 Wesley had 12 days vacation