This is a basic exercise in balancing nuclear reactions involving α and β(+,-) decays as well as with simple fission processes with only two products. When you press "New Question", a reaction/description will appear. Enter the mass number (leading superscript, found to the upper left of the X) and the atomic number (trailing subscript, found to the lower right of the X), then press "Check Answer". Pressing "Show Answer" will display the complete solution to the problem.