My daughter has as many sisters as brothers. Each of her brothers has twice as many sisters as brothers. How many sons and daughters do I have?
Let b = boys and g = girls
b = g-1 the number of boys is one less than the number of girls
g = 2(b-1) a brother has b-1 brothers.and twice as many sisters
You now have two equations for two unknowns. Can you take it from here?
