Blocks in Tower Problem

During a science fair, students were required to create models using small blocks. Steven's model uses a total of 120 blocks. The model consists of two sections: a base and a tower. The base uses 2 blocks for every block used in the tower. If we let b represent the number of blocks in the tower, we can express the total number of blocks used in terms of b as follows:

$120 = 2b + b$

What is the number of blocks in the tower?