Area of Rectangle and Triangle

A rectangle and a triangle share the same base length of $b$ and height $h$. The area of the rectangle is given by the formula $A_{rectangle} = b \cdot h$, while the area of the triangle is calculated using the formula $A_{triangle} = \f\frac{1}{2} \cdot b \cdot h$. If the combined area of the rectangle and the triangle equals 60 square units, what is the value of $b + h$ if $b$ is equal to 3 times $h$?