Word Problem

Diane loves to walk around the neighborhood and enjoy the Christmas trees that her neighbors have decorated. On one side of the street there was 1 beatifully decorated tree .  The other side of the street had 1 decorated tree.  

Hint:  If it helps, draw the Christmas Trees in the space below.

Write the math equation: ______________________

How many decorated trees were there in all?  _______

Show your work!