There are 55 girls in the eighth grade
<h3>Representation</h3>
Represent the boys with b, and the girls with g.
<h3>System of equations</h3>
So, the equations are:
Substitute 10 + b for g in the first equation
Expand the equation
Add b to both sides of the equation
Divide both sides by 2
Substitute 45 for b in
Hence, there are 55 girls in the eighth grade
Read more about system of equations at:
brainly.com/question/14323743