A special school has a deaf-student population 3 times its blind-student population. If there are 180 students in total, how many blind students are there?
Let the number of blind students be x.
The number of deaf students will then be 3*x = 3x students.
The total number of students is x + 3x = 180 students.
Combining like terms gives 4x = 180.
So the value of x is 180/4 = <<180/4=45>>45.
#### 45