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.
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}.
To find out how many students still need to complete the form, we can subtract the number of students who have already filled out the permission form from the total number of students.
Let's denote the number of students who still need to complete the form as "x".
The equation to represent this situation is:
Total number of students - Number of students who have filled out the form = Number of students who still need to complete the form
x = 86 - 57
To find the value of x, we can subtract 57 from 86:
x = 29
Therefore, 29 students still need to complete the form.
To find out how many students still need to complete the form, we can subtract the number of students who have already filled out the form from the total number of students.
Let's define:
N = total number of students
F = number of students who have filled out the form
S = number of students who still need to complete the form
We are given that N = 86 and F = 57.
Using this information, we can write the equation:
N = F + S
Substituting the given values, we have:
86 = 57 + S
To solve for S, we can isolate S by subtracting 57 from both sides of the equation:
86 - 57 = S
29 = S
Therefore, there are 29 students who still need to complete the form.