86 students are planning to attend a field trip. 57 students have already filled out the permission form. How many students still need to complete the form? Write the equation and solve.

Answer 1

Let x be the number of students who still need to complete the form.
The total number of students is 86.
57 students have already filled out the form.
So the number of students who still need to complete the form is x = 86 - 57 = <<86-57=29>>29. Answer: \boxed{29}.