While David was solving the equation $100x+300=500$, he wondered if he could first change the equation to $x+3=5$. What do you think?

1. Solve both equations and verify that they have the same solution.

   Answer (a):

   Yes, $x=2$ in both equations.

2. What could you do to the equation $100x+300=500$ to change it into $x+3=5$?

   Hint (b):

   By what number can you divide the equation?