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10 April, 06:00

The number of girls in the school is 57 less than 2 times the number of boys in the school. There are 143 girls in the school. How many boys are in the school?

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  1. 10 April, 07:33
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    Let x = number of boys

    So 2x - 57 is the number of girls

    If there are 143 girls;

    2x - 57 = 143; add 57 to both sides;

    2x = 200 divide by 2 to solve for x;

    x = 100, the number of boys in the school

    Check: does 2 (100) - 57 = 143, and the answer is yes
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