To find out how many students Mr. Star has, let's analyze the problem step by step.
1. Understand the Problem:
- Mr. Wilson has 30 students in his class.
- Mr. Wilson has 12 more students than Mr. Star has.
- We need to determine the number of students Mr. Star has.
2. Formulate the Equation:
- Let [tex]\( x \)[/tex] represent the number of students that Mr. Star has.
- Since Mr. Wilson has 12 more students than Mr. Star, we can write this relationship as:
[tex]\[
x + 12 = 30
\][/tex]
3. Solve the Equation:
- To find [tex]\( x \)[/tex], we need to isolate [tex]\( x \)[/tex] on one side of the equation. We can do this by subtracting 12 from both sides:
[tex]\[
x + 12 - 12 = 30 - 12
\][/tex]
- This simplifies to:
[tex]\[
x = 18
\][/tex]
4. Choose the Correct Option:
- From the problem statement, we look for the correct equation and solution. Only option D matches our derived equation and solution:
[tex]\[
x + 12 = 30 \quad \text{and} \quad x = 18 \quad \text{students}
\][/tex]
Therefore, Mr. Star has 18 students. The correct equation and answer are:
D. [tex]\( x + 12 = 30 \)[/tex] and [tex]\( x = 18 \)[/tex] students.
