Answer:
16 boys total
8 girls total
Explanation:
We know that Hillary invited 23 of her friends, including her, this lets us know there are 24 people total.
Given, we already know 8 of that 24 are boys, which leaves us with 16 people left.
24 - 8 = 16
We simply know there are 8 girls and 8 boys from this problem and on top we add 8 more boys because there are 8 more boys.
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Total = 1 + 23 = 24
Girls:
x + (x + 8) = 24
2x = 16
x = 8
Boys:
x + 8 = 1b