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Posted by on Thursday, January 27, 2011 at 12:27am.

Mr. davison has 30 students in his class . He has four more girls than boys. How many boys are in Mr. Davision class? can you please check my answer? I got 11 boys . does it sound about right ?

  • 5th math - , Thursday, January 27, 2011 at 12:30am

    x = number of boys
    x + 4 = number of girls

    x + x + 4 = 30
    2x + 4 = 30
    2x = 26
    x = 13

    x = number of boys = 13
    x + 4 = number of girls = 13 + 4 = 17

    13 boys + 17 girls = 30

  • 5th math - , Monday, October 8, 2012 at 7:25pm

    x = number of boys
    x + 4 = number of girls

    x + x + 4 = 30
    2x + 4 = 30
    2x = 26
    x = 13

    x = number of boys = 13
    x + 4 = number of girls = 13 + 4 = 17

    13 boys + 17 girls = 30

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