Max was on vacation twice as long as Jared and Half as long as Wesley. The boys were on vacation a total of 3 weeks. How many days was each boy on vacation?

Lets say W=Wesley, M=Max, and J=Jared. So your equations are M=2J, 2M=W, and M+J+W=21days(3 weeks) So substituting M and W into M+J+W=21 gives you 2J+J+2M=21, substitute M again, to get 2J+J+4J=21 so you get 7J=21 so J= 3 days.

Using J=3, substitute in to find M,

using M=2J, so M=2(3) so M=6 and using that, substitute into

There are 4 semi-trailer trucks parked in a line at the rest stop. After the first truck, each truck in the line weighs 2 tons more than the truck before it. The trucks weigh a total of 32 tons. how many pounds does each truck weigh?