# There are b boys in the class. This is three more than four times the number of girls. How many girls are in the class?

There are $\frac{b - 3}{4}$ girls in the class.
As boys are three more than four times the girls and there are $b$ boys, let us first reduce $3$ from $b$ which gives us $\left(b - 3\right)$ boys.
As such $\left(b - 3\right)$ must be four times number of girls.
Hence, there are $\frac{b - 3}{4}$ girls in the class.