There are 76 students in Class 62. Among them, 13 girls and half of the boys took part in the math contest, and the remaining boys and girls were equal in number, and how much more boys were than girl

13+X+2X=76

X=2 1

Male: 2 1x2=43 (person)

Female: 13+2 1=34 (person)

43-34=9 (person)

There are nine more boys than girls.

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