Final answer:
To find the number of girls in the classroom, subtract the number of boys from the total number of students. The equation g + (g + 7) = 57 can be solved to find that there are 25 girls.
Step-by-step explanation:
To find the number of girls in the classroom, we can subtract the number of boys from the total number of students. In this case, there are 57 students in the classroom and the number of boys is 7 more than the number of girls. Let's represent the number of girls as 'g'. So, the number of boys would be 'g + 7'. Given that the total number of students is 57, we can form an equation: g + (g + 7) = 57.
Combining like terms, we get 2g + 7 = 57.
Subtracting 7 from both sides of the equation, we have 2g = 50.
Finally, dividing both sides by 2, we find that g = 25.
So, there are 25 girls in the classroom.
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