There were 25 students in an algebra class. if the number of girls is 10 more than half the number of boys, how many boys were in the class?

Let x represent the number of boys.
Then 1/2x + 10 represents the number of girls. (there are 10 more than half the number of boys)

We can set up a simple equation for this situation:

# of boys + # of girls = 25 students

so

x + (1/2x + 10) = 25
x + 1/2x + 10 = 25

1/2 = 0.5

x + 0.5x + 10 = 25
1.5x + 10 = 25
1.5x = 25 - 10
1.5x = 15
x = 15/1.5
x = 10

x = # of boys, so there are 10 boys in the class.

Good luck on your math!

-Jabba