There are 18 boys. 29-7=22. This makes the amount of boys and girls equal. Divide by 2 to get the amount of boys. 22/2 is 11. Then add the 7 more which will get you 18.
well take 7 away from 29 that leaves you with 22 half of 22 is 11 and if the were 7 more boys than girls you would add the 11 and 7 that makes 18 boys and 11 girls in the class
