write an equation to solve each part of the two-step problem ken has 45 stamps. He uses 20 stamps. Then he buys 7 more stamps. How many stamps does he have now?
Ken has 45 stamps originally. Then, he uses 20 stamps. After using 20 stamps, he buys 7 more. The equation would be: (45 - 20) + 7. He now has 32 stamps.
