Last week Fred had 42 dollars and Jason had 4 dollars. Fred washed cars over the weekend and now has 34 dollars and Jason did not work. How much money do they have together now?
Fred had 42 dollars and Jason had 4 dollars. 

That means that together, they had 42 + 4 = 46 dollars. 

Fred washed cars over the weekend and now has 34 dollars. 

That means that now, together, they have 34 + 4 = 38 dollars.