SOLUTION: Please help me solve Joshua had a $150 more than Jason and $70 less than George the three boys had a total of $790 How much did George have?

Let x = #$ Joshua has.
Then Jason has (x-150) dollars, and
     George has (x+70) dollars.

In total, they have x + (x-150) + (x+70) = 3x -80.

So, your equation is 

3x - 80 = 790.

3x = 790 + 80,

3x = 870,

x =  = 290.

Now complete the solution yourself.