There are 33 students in an Algebra I class. There are 7 fewer girls than boys. How many girls are i

Discussion in 'Calculator Requests' started by math_celebrity, May 8, 2019.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    There are 33 students in an Algebra I class. There are 7 fewer girls than boys. How many girls are in the class?

    Let b be the number of boys and g be the number of girls. We are given 2 equations:
    1. g = b - 7
    2. b + g = 33
    Substitute (1) into (2):
    b + (b - 7) = 33

    Combine like terms:
    2b - 7 = 33

    Typing this equation into our search engine, we get b = 20.

    Since the problem asks for how many girls (g) we have, we substitute b = 20 into Equation (1):
    g = 20 - 7
    g = 13
     

Share This Page