Math

5/8 of the students in my class were boys.
When 6 girls joined the class, the number of boys equaled the number of girls.
How many students were in my class then?

"What's the formula for this problem?"

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  1. b = (5/8) s
    so
    g = (3/8) s
    now g = (3/8) s + 6
    and number of students = s + 6

    b = 5/8 s = (3/8)s +6
    so
    (2/8)s = 6
    s = 24

    that was original s
    s+6 = new total = 30

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