The answer is 23. you take .4 and times it by the first number, then times it by that number until you have 10 numbers. then add all of those numbers up
10(.5x + 6) = 8
.5 can also be exchanged for a 1/2
To solve this, you can distribute the 10 and then subtract and divide, like so:
5x + 60 = 8
5x = -52
x = -10.4
2+3=5
5x=y
25 is the only number between 20 and 30 divisible by 5
5x=25
x=5
5*2= 10
There are 10 boys
5*3= 15
There are 15 girls
There are 25 total members